2 * Adaptec AIC79xx device driver for Linux.
4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $
6 * --------------------------------------------------------------------------
7 * Copyright (c) 1994-2000 Justin T. Gibbs.
8 * Copyright (c) 1997-1999 Doug Ledford
9 * Copyright (c) 2000-2003 Adaptec Inc.
10 * All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the following disclaimer,
17 * without modification.
18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19 * substantially similar to the "NO WARRANTY" disclaimer below
20 * ("Disclaimer") and any redistribution must be conditioned upon
21 * including a substantially similar Disclaimer requirement for further
22 * binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGES.
45 #include "aic79xx_osm.h"
46 #include "aic79xx_inline.h"
47 #include <scsi/scsicam.h>
50 * Include aiclib.c as part of our
51 * "module dependencies are hard" work around.
55 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
56 #include <linux/init.h> /* __setup */
59 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
60 #include "sd.h" /* For geometry detection */
63 #include <linux/mm.h> /* For fetching system memory size */
64 #include <linux/delay.h> /* For ssleep/msleep */
67 * Lock protecting manipulation of the ahd softc list.
69 spinlock_t ahd_list_spinlock;
71 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0)
72 struct proc_dir_entry proc_scsi_aic79xx = {
73 PROC_SCSI_AIC79XX, 7, "aic79xx",
74 S_IFDIR | S_IRUGO | S_IXUGO, 2,
75 0, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL
79 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
80 /* For dynamic sglist size calculation. */
85 * Bucket size for counting good commands in between bad ones.
87 #define AHD_LINUX_ERR_THRESH 1000
90 * Set this to the delay in seconds after SCSI bus reset.
91 * Note, we honor this only for the initial bus reset.
92 * The scsi error recovery code performs its own bus settle
93 * delay handling for error recovery actions.
95 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS
96 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
98 #define AIC79XX_RESET_DELAY 5000
102 * To change the default number of tagged transactions allowed per-device,
103 * add a line to the lilo.conf file like:
104 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
105 * which will result in the first four devices on the first two
106 * controllers being set to a tagged queue depth of 32.
108 * The tag_commands is an array of 16 to allow for wide and twin adapters.
109 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
113 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */
114 } adapter_tag_info_t;
117 * Modify this as you see fit for your system.
119 * 0 tagged queuing disabled
120 * 1 <= n <= 253 n == max tags ever dispatched.
122 * The driver will throttle the number of commands dispatched to a
123 * device if it returns queue full. For devices with a fixed maximum
124 * queue depth, the driver will eventually determine this depth and
125 * lock it in (a console message is printed to indicate that a lock
126 * has occurred). On some devices, queue full is returned for a temporary
127 * resource shortage. These devices will return queue full at varying
128 * depths. The driver will throttle back when the queue fulls occur and
129 * attempt to slowly increase the depth over time as the device recovers
130 * from the resource shortage.
132 * In this example, the first line will disable tagged queueing for all
133 * the devices on the first probed aic79xx adapter.
135 * The second line enables tagged queueing with 4 commands/LUN for IDs
136 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
137 * driver to attempt to use up to 64 tags for ID 1.
139 * The third line is the same as the first line.
141 * The fourth line disables tagged queueing for devices 0 and 3. It
142 * enables tagged queueing for the other IDs, with 16 commands/LUN
143 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
144 * IDs 2, 5-7, and 9-15.
148 * NOTE: The below structure is for reference only, the actual structure
149 * to modify in order to change things is just below this comment block.
150 adapter_tag_info_t aic79xx_tag_info[] =
152 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
153 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
154 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
155 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
159 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
160 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
162 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
165 #define AIC79XX_CONFIGED_TAG_COMMANDS { \
166 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
167 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
168 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
169 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
170 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
171 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
172 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
173 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \
177 * By default, use the number of commands specified by
178 * the users kernel configuration.
180 static adapter_tag_info_t aic79xx_tag_info[] =
182 {AIC79XX_CONFIGED_TAG_COMMANDS},
183 {AIC79XX_CONFIGED_TAG_COMMANDS},
184 {AIC79XX_CONFIGED_TAG_COMMANDS},
185 {AIC79XX_CONFIGED_TAG_COMMANDS},
186 {AIC79XX_CONFIGED_TAG_COMMANDS},
187 {AIC79XX_CONFIGED_TAG_COMMANDS},
188 {AIC79XX_CONFIGED_TAG_COMMANDS},
189 {AIC79XX_CONFIGED_TAG_COMMANDS},
190 {AIC79XX_CONFIGED_TAG_COMMANDS},
191 {AIC79XX_CONFIGED_TAG_COMMANDS},
192 {AIC79XX_CONFIGED_TAG_COMMANDS},
193 {AIC79XX_CONFIGED_TAG_COMMANDS},
194 {AIC79XX_CONFIGED_TAG_COMMANDS},
195 {AIC79XX_CONFIGED_TAG_COMMANDS},
196 {AIC79XX_CONFIGED_TAG_COMMANDS},
197 {AIC79XX_CONFIGED_TAG_COMMANDS}
201 * By default, read streaming is disabled. In theory,
202 * read streaming should enhance performance, but early
203 * U320 drive firmware actually performs slower with
204 * read streaming enabled.
206 #ifdef CONFIG_AIC79XX_ENABLE_RD_STRM
207 #define AIC79XX_CONFIGED_RD_STRM 0xFFFF
209 #define AIC79XX_CONFIGED_RD_STRM 0
212 static uint16_t aic79xx_rd_strm_info[] =
214 AIC79XX_CONFIGED_RD_STRM,
215 AIC79XX_CONFIGED_RD_STRM,
216 AIC79XX_CONFIGED_RD_STRM,
217 AIC79XX_CONFIGED_RD_STRM,
218 AIC79XX_CONFIGED_RD_STRM,
219 AIC79XX_CONFIGED_RD_STRM,
220 AIC79XX_CONFIGED_RD_STRM,
221 AIC79XX_CONFIGED_RD_STRM,
222 AIC79XX_CONFIGED_RD_STRM,
223 AIC79XX_CONFIGED_RD_STRM,
224 AIC79XX_CONFIGED_RD_STRM,
225 AIC79XX_CONFIGED_RD_STRM,
226 AIC79XX_CONFIGED_RD_STRM,
227 AIC79XX_CONFIGED_RD_STRM,
228 AIC79XX_CONFIGED_RD_STRM,
229 AIC79XX_CONFIGED_RD_STRM
235 * positive value = DV Enabled
237 * negative value = DV Default for adapter type/seeprom
239 #ifdef CONFIG_AIC79XX_DV_SETTING
240 #define AIC79XX_CONFIGED_DV CONFIG_AIC79XX_DV_SETTING
242 #define AIC79XX_CONFIGED_DV -1
245 static int8_t aic79xx_dv_settings[] =
266 * The I/O cell on the chip is very configurable in respect to its analog
267 * characteristics. Set the defaults here; they can be overriden with
268 * the proper insmod parameters.
270 struct ahd_linux_iocell_opts
276 #define AIC79XX_DEFAULT_PRECOMP 0xFF
277 #define AIC79XX_DEFAULT_SLEWRATE 0xFF
278 #define AIC79XX_DEFAULT_AMPLITUDE 0xFF
279 #define AIC79XX_DEFAULT_IOOPTS \
281 AIC79XX_DEFAULT_PRECOMP, \
282 AIC79XX_DEFAULT_SLEWRATE, \
283 AIC79XX_DEFAULT_AMPLITUDE \
285 #define AIC79XX_PRECOMP_INDEX 0
286 #define AIC79XX_SLEWRATE_INDEX 1
287 #define AIC79XX_AMPLITUDE_INDEX 2
288 static struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
290 AIC79XX_DEFAULT_IOOPTS,
291 AIC79XX_DEFAULT_IOOPTS,
292 AIC79XX_DEFAULT_IOOPTS,
293 AIC79XX_DEFAULT_IOOPTS,
294 AIC79XX_DEFAULT_IOOPTS,
295 AIC79XX_DEFAULT_IOOPTS,
296 AIC79XX_DEFAULT_IOOPTS,
297 AIC79XX_DEFAULT_IOOPTS,
298 AIC79XX_DEFAULT_IOOPTS,
299 AIC79XX_DEFAULT_IOOPTS,
300 AIC79XX_DEFAULT_IOOPTS,
301 AIC79XX_DEFAULT_IOOPTS,
302 AIC79XX_DEFAULT_IOOPTS,
303 AIC79XX_DEFAULT_IOOPTS,
304 AIC79XX_DEFAULT_IOOPTS,
305 AIC79XX_DEFAULT_IOOPTS
309 * There should be a specific return value for this in scsi.h, but
310 * it seems that most drivers ignore it.
312 #define DID_UNDERFLOW DID_ERROR
315 ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
317 printk("(scsi%d:%c:%d:%d): ",
318 ahd->platform_data->host->host_no,
319 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
320 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
321 scb != NULL ? SCB_GET_LUN(scb) : -1);
325 * XXX - these options apply unilaterally to _all_ adapters
326 * cards in the system. This should be fixed. Exceptions to this
327 * rule are noted in the comments.
331 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
332 * has no effect on any later resets that might occur due to things like
335 static uint32_t aic79xx_no_reset;
338 * Certain PCI motherboards will scan PCI devices from highest to lowest,
339 * others scan from lowest to highest, and they tend to do all kinds of
340 * strange things when they come into contact with PCI bridge chips. The
341 * net result of all this is that the PCI card that is actually used to boot
342 * the machine is very hard to detect. Most motherboards go from lowest
343 * PCI slot number to highest, and the first SCSI controller found is the
344 * one you boot from. The only exceptions to this are when a controller
345 * has its BIOS disabled. So, we by default sort all of our SCSI controllers
346 * from lowest PCI slot number to highest PCI slot number. We also force
347 * all controllers with their BIOS disabled to the end of the list. This
348 * works on *almost* all computers. Where it doesn't work, we have this
349 * option. Setting this option to non-0 will reverse the order of the sort
350 * to highest first, then lowest, but will still leave cards with their BIOS
351 * disabled at the very end. That should fix everyone up unless there are
352 * really strange cirumstances.
354 static uint32_t aic79xx_reverse_scan;
357 * Should we force EXTENDED translation on a controller.
358 * 0 == Use whatever is in the SEEPROM or default to off
359 * 1 == Use whatever is in the SEEPROM or default to on
361 static uint32_t aic79xx_extended;
364 * PCI bus parity checking of the Adaptec controllers. This is somewhat
365 * dubious at best. To my knowledge, this option has never actually
366 * solved a PCI parity problem, but on certain machines with broken PCI
367 * chipset configurations, it can generate tons of false error messages.
368 * It's included in the driver for completeness.
369 * 0 = Shut off PCI parity check
370 * non-0 = Enable PCI parity check
372 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
373 * variable to -1 you would actually want to simply pass the variable
374 * name without a number. That will invert the 0 which will result in
377 static uint32_t aic79xx_pci_parity = ~0;
380 * There are lots of broken chipsets in the world. Some of them will
381 * violate the PCI spec when we issue byte sized memory writes to our
382 * controller. I/O mapped register access, if allowed by the given
383 * platform, will work in almost all cases.
385 uint32_t aic79xx_allow_memio = ~0;
388 * aic79xx_detect() has been run, so register all device arrivals
389 * immediately with the system rather than deferring to the sorted
390 * attachment performed by aic79xx_detect().
392 int aic79xx_detect_complete;
395 * So that we can set how long each device is given as a selection timeout.
396 * The table of values goes like this:
401 * We default to 256ms because some older devices need a longer time
402 * to respond to initial selection.
404 static uint32_t aic79xx_seltime;
407 * Certain devices do not perform any aging on commands. Should the
408 * device be saturated by commands in one portion of the disk, it is
409 * possible for transactions on far away sectors to never be serviced.
410 * To handle these devices, we can periodically send an ordered tag to
411 * force all outstanding transactions to be serviced prior to a new
414 uint32_t aic79xx_periodic_otag;
417 * Module information and settable options.
419 static char *aic79xx = NULL;
421 * Just in case someone uses commas to separate items on the insmod
422 * command line, we define a dummy buffer here to avoid having insmod
423 * write wild stuff into our code segment
425 static char dummy_buffer[60] = "Please don't trounce on me insmod!!\n";
427 MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
428 MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver");
429 MODULE_LICENSE("Dual BSD/GPL");
430 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
431 MODULE_PARM(aic79xx, "s");
432 MODULE_PARM_DESC(aic79xx,
433 "period delimited, options string.\n"
434 " verbose Enable verbose/diagnostic logging\n"
435 " allow_memio Allow device registers to be memory mapped\n"
436 " debug Bitmask of debug values to enable\n"
437 " no_reset Supress initial bus resets\n"
438 " extended Enable extended geometry on all controllers\n"
439 " periodic_otag Send an ordered tagged transaction\n"
440 " periodically to prevent tag starvation.\n"
441 " This may be required by some older disk\n"
442 " or drives/RAID arrays.\n"
443 " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
444 " tag_info:<tag_str> Set per-target tag depth\n"
445 " global_tag_depth:<int> Global tag depth for all targets on all buses\n"
446 " rd_strm:<rd_strm_masks> Set per-target read streaming setting.\n"
447 " dv:<dv_settings> Set per-controller Domain Validation Setting.\n"
448 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
449 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
450 " amplitude:<int> Set the signal amplitude (0-7).\n"
451 " seltime:<int> Selection Timeout:\n"
452 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
454 " Sample /etc/modprobe.conf line:\n"
455 " Enable verbose logging\n"
456 " Set tag depth on Controller 2/Target 2 to 10 tags\n"
457 " Shorten the selection timeout to 128ms\n"
459 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
461 " Sample /etc/modprobe.conf line:\n"
462 " Change Read Streaming for Controller's 2 and 3\n"
464 " options aic79xx 'aic79xx=rd_strm:{..0xFFF0.0xC0F0}'");
466 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
467 struct ahd_linux_device *,
469 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
471 static void ahd_linux_filter_inquiry(struct ahd_softc *ahd,
472 struct ahd_devinfo *devinfo);
473 static void ahd_linux_dev_timed_unfreeze(u_long arg);
474 static void ahd_linux_sem_timeout(u_long arg);
475 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
476 static void ahd_linux_size_nseg(void);
477 static void ahd_linux_thread_run_complete_queue(struct ahd_softc *ahd);
478 static void ahd_linux_start_dv(struct ahd_softc *ahd);
479 static void ahd_linux_dv_timeout(struct scsi_cmnd *cmd);
480 static int ahd_linux_dv_thread(void *data);
481 static void ahd_linux_kill_dv_thread(struct ahd_softc *ahd);
482 static void ahd_linux_dv_target(struct ahd_softc *ahd, u_int target);
483 static void ahd_linux_dv_transition(struct ahd_softc *ahd,
484 struct scsi_cmnd *cmd,
485 struct ahd_devinfo *devinfo,
486 struct ahd_linux_target *targ);
487 static void ahd_linux_dv_fill_cmd(struct ahd_softc *ahd,
488 struct scsi_cmnd *cmd,
489 struct ahd_devinfo *devinfo);
490 static void ahd_linux_dv_inq(struct ahd_softc *ahd,
491 struct scsi_cmnd *cmd,
492 struct ahd_devinfo *devinfo,
493 struct ahd_linux_target *targ,
494 u_int request_length);
495 static void ahd_linux_dv_tur(struct ahd_softc *ahd,
496 struct scsi_cmnd *cmd,
497 struct ahd_devinfo *devinfo);
498 static void ahd_linux_dv_rebd(struct ahd_softc *ahd,
499 struct scsi_cmnd *cmd,
500 struct ahd_devinfo *devinfo,
501 struct ahd_linux_target *targ);
502 static void ahd_linux_dv_web(struct ahd_softc *ahd,
503 struct scsi_cmnd *cmd,
504 struct ahd_devinfo *devinfo,
505 struct ahd_linux_target *targ);
506 static void ahd_linux_dv_reb(struct ahd_softc *ahd,
507 struct scsi_cmnd *cmd,
508 struct ahd_devinfo *devinfo,
509 struct ahd_linux_target *targ);
510 static void ahd_linux_dv_su(struct ahd_softc *ahd,
511 struct scsi_cmnd *cmd,
512 struct ahd_devinfo *devinfo,
513 struct ahd_linux_target *targ);
514 static int ahd_linux_fallback(struct ahd_softc *ahd,
515 struct ahd_devinfo *devinfo);
516 static __inline int ahd_linux_dv_fallback(struct ahd_softc *ahd,
517 struct ahd_devinfo *devinfo);
518 static void ahd_linux_dv_complete(Scsi_Cmnd *cmd);
519 static void ahd_linux_generate_dv_pattern(struct ahd_linux_target *targ);
520 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
521 struct ahd_devinfo *devinfo);
522 static u_int ahd_linux_user_dv_setting(struct ahd_softc *ahd);
523 static void ahd_linux_setup_user_rd_strm_settings(struct ahd_softc *ahd);
524 static void ahd_linux_device_queue_depth(struct ahd_softc *ahd,
525 struct ahd_linux_device *dev);
526 static struct ahd_linux_target* ahd_linux_alloc_target(struct ahd_softc*,
528 static void ahd_linux_free_target(struct ahd_softc*,
529 struct ahd_linux_target*);
530 static struct ahd_linux_device* ahd_linux_alloc_device(struct ahd_softc*,
531 struct ahd_linux_target*,
533 static void ahd_linux_free_device(struct ahd_softc*,
534 struct ahd_linux_device*);
535 static void ahd_linux_run_device_queue(struct ahd_softc*,
536 struct ahd_linux_device*);
537 static void ahd_linux_setup_tag_info_global(char *p);
538 static aic_option_callback_t ahd_linux_setup_tag_info;
539 static aic_option_callback_t ahd_linux_setup_rd_strm_info;
540 static aic_option_callback_t ahd_linux_setup_dv;
541 static aic_option_callback_t ahd_linux_setup_iocell_info;
542 static int ahd_linux_next_unit(void);
543 static void ahd_runq_tasklet(unsigned long data);
544 static int aic79xx_setup(char *c);
546 /****************************** Inlines ***************************************/
547 static __inline void ahd_schedule_completeq(struct ahd_softc *ahd);
548 static __inline void ahd_schedule_runq(struct ahd_softc *ahd);
549 static __inline void ahd_setup_runq_tasklet(struct ahd_softc *ahd);
550 static __inline void ahd_teardown_runq_tasklet(struct ahd_softc *ahd);
551 static __inline struct ahd_linux_device*
552 ahd_linux_get_device(struct ahd_softc *ahd, u_int channel,
553 u_int target, u_int lun, int alloc);
554 static struct ahd_cmd *ahd_linux_run_complete_queue(struct ahd_softc *ahd);
555 static __inline void ahd_linux_check_device_queue(struct ahd_softc *ahd,
556 struct ahd_linux_device *dev);
557 static __inline struct ahd_linux_device *
558 ahd_linux_next_device_to_run(struct ahd_softc *ahd);
559 static __inline void ahd_linux_run_device_queues(struct ahd_softc *ahd);
560 static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
562 static __inline int ahd_linux_map_seg(struct ahd_softc *ahd, struct scb *scb,
563 struct ahd_dma_seg *sg,
564 bus_addr_t addr, bus_size_t len);
567 ahd_schedule_completeq(struct ahd_softc *ahd)
569 if ((ahd->platform_data->flags & AHD_RUN_CMPLT_Q_TIMER) == 0) {
570 ahd->platform_data->flags |= AHD_RUN_CMPLT_Q_TIMER;
571 ahd->platform_data->completeq_timer.expires = jiffies;
572 add_timer(&ahd->platform_data->completeq_timer);
577 * Must be called with our lock held.
580 ahd_schedule_runq(struct ahd_softc *ahd)
582 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
583 tasklet_schedule(&ahd->platform_data->runq_tasklet);
586 * Tasklets are not available, so run inline.
588 ahd_runq_tasklet((unsigned long)ahd);
593 void ahd_setup_runq_tasklet(struct ahd_softc *ahd)
595 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
596 tasklet_init(&ahd->platform_data->runq_tasklet, ahd_runq_tasklet,
602 ahd_teardown_runq_tasklet(struct ahd_softc *ahd)
604 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
605 tasklet_kill(&ahd->platform_data->runq_tasklet);
609 static __inline struct ahd_linux_device*
610 ahd_linux_get_device(struct ahd_softc *ahd, u_int channel, u_int target,
611 u_int lun, int alloc)
613 struct ahd_linux_target *targ;
614 struct ahd_linux_device *dev;
617 target_offset = target;
620 targ = ahd->platform_data->targets[target_offset];
623 targ = ahd_linux_alloc_target(ahd, channel, target);
629 dev = targ->devices[lun];
630 if (dev == NULL && alloc != 0)
631 dev = ahd_linux_alloc_device(ahd, targ, lun);
635 #define AHD_LINUX_MAX_RETURNED_ERRORS 4
636 static struct ahd_cmd *
637 ahd_linux_run_complete_queue(struct ahd_softc *ahd)
639 struct ahd_cmd *acmd;
644 ahd_done_lock(ahd, &done_flags);
645 while ((acmd = TAILQ_FIRST(&ahd->platform_data->completeq)) != NULL) {
648 if (with_errors > AHD_LINUX_MAX_RETURNED_ERRORS) {
650 * Linux uses stack recursion to requeue
651 * commands that need to be retried. Avoid
652 * blowing out the stack by "spoon feeding"
653 * commands that completed with error back
654 * the operating system in case they are going
655 * to be retried. "ick"
657 ahd_schedule_completeq(ahd);
660 TAILQ_REMOVE(&ahd->platform_data->completeq,
661 acmd, acmd_links.tqe);
662 cmd = &acmd_scsi_cmd(acmd);
663 cmd->host_scribble = NULL;
664 if (ahd_cmd_get_transaction_status(cmd) != DID_OK
665 || (cmd->result & 0xFF) != SCSI_STATUS_OK)
670 ahd_done_unlock(ahd, &done_flags);
675 ahd_linux_check_device_queue(struct ahd_softc *ahd,
676 struct ahd_linux_device *dev)
678 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) != 0
679 && dev->active == 0) {
680 dev->flags &= ~AHD_DEV_FREEZE_TIL_EMPTY;
684 if (TAILQ_FIRST(&dev->busyq) == NULL
685 || dev->openings == 0 || dev->qfrozen != 0)
688 ahd_linux_run_device_queue(ahd, dev);
691 static __inline struct ahd_linux_device *
692 ahd_linux_next_device_to_run(struct ahd_softc *ahd)
695 if ((ahd->flags & AHD_RESOURCE_SHORTAGE) != 0
696 || (ahd->platform_data->qfrozen != 0
697 && AHD_DV_SIMQ_FROZEN(ahd) == 0))
699 return (TAILQ_FIRST(&ahd->platform_data->device_runq));
703 ahd_linux_run_device_queues(struct ahd_softc *ahd)
705 struct ahd_linux_device *dev;
707 while ((dev = ahd_linux_next_device_to_run(ahd)) != NULL) {
708 TAILQ_REMOVE(&ahd->platform_data->device_runq, dev, links);
709 dev->flags &= ~AHD_DEV_ON_RUN_LIST;
710 ahd_linux_check_device_queue(ahd, dev);
715 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
721 direction = scsi_to_pci_dma_dir(cmd->sc_data_direction);
722 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
723 if (cmd->use_sg != 0) {
724 struct scatterlist *sg;
726 sg = (struct scatterlist *)cmd->request_buffer;
727 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction);
728 } else if (cmd->request_bufflen != 0) {
729 pci_unmap_single(ahd->dev_softc,
730 scb->platform_data->buf_busaddr,
731 cmd->request_bufflen, direction);
736 ahd_linux_map_seg(struct ahd_softc *ahd, struct scb *scb,
737 struct ahd_dma_seg *sg, bus_addr_t addr, bus_size_t len)
741 if ((scb->sg_count + 1) > AHD_NSEG)
742 panic("Too few segs for dma mapping. "
743 "Increase AHD_NSEG\n");
746 sg->addr = ahd_htole32(addr & 0xFFFFFFFF);
747 scb->platform_data->xfer_len += len;
749 if (sizeof(bus_addr_t) > 4
750 && (ahd->flags & AHD_39BIT_ADDRESSING) != 0)
751 len |= (addr >> 8) & AHD_SG_HIGH_ADDR_MASK;
753 sg->len = ahd_htole32(len);
757 /******************************** Macros **************************************/
758 #define BUILD_SCSIID(ahd, cmd) \
759 ((((cmd)->device->id << TID_SHIFT) & TID) | (ahd)->our_id)
761 /************************ Host template entry points *************************/
762 static int ahd_linux_detect(Scsi_Host_Template *);
763 static const char *ahd_linux_info(struct Scsi_Host *);
764 static int ahd_linux_queue(Scsi_Cmnd *, void (*)(Scsi_Cmnd *));
765 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
766 static int ahd_linux_slave_alloc(Scsi_Device *);
767 static int ahd_linux_slave_configure(Scsi_Device *);
768 static void ahd_linux_slave_destroy(Scsi_Device *);
769 #if defined(__i386__)
770 static int ahd_linux_biosparam(struct scsi_device*,
771 struct block_device*, sector_t, int[]);
774 static int ahd_linux_release(struct Scsi_Host *);
775 static void ahd_linux_select_queue_depth(struct Scsi_Host *host,
776 Scsi_Device *scsi_devs);
777 #if defined(__i386__)
778 static int ahd_linux_biosparam(Disk *, kdev_t, int[]);
781 static int ahd_linux_bus_reset(Scsi_Cmnd *);
782 static int ahd_linux_dev_reset(Scsi_Cmnd *);
783 static int ahd_linux_abort(Scsi_Cmnd *);
786 * Calculate a safe value for AHD_NSEG (as expressed through ahd_linux_nseg).
789 * The midlayer allocates an S/G array dynamically when a command is issued
790 * using SCSI malloc. This array, which is in an OS dependent format that
791 * must later be copied to our private S/G list, is sized to house just the
792 * number of segments needed for the current transfer. Since the code that
793 * sizes the SCSI malloc pool does not take into consideration fragmentation
794 * of the pool, executing transactions numbering just a fraction of our
795 * concurrent transaction limit with SG list lengths aproaching AHC_NSEG will
796 * quickly depleat the SCSI malloc pool of usable space. Unfortunately, the
797 * mid-layer does not properly handle this scsi malloc failures for the S/G
798 * array and the result can be a lockup of the I/O subsystem. We try to size
799 * our S/G list so that it satisfies our drivers allocation requirements in
800 * addition to avoiding fragmentation of the SCSI malloc pool.
803 ahd_linux_size_nseg(void)
805 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
810 * The SCSI allocator rounds to the nearest 512 bytes
811 * an cannot allocate across a page boundary. Our algorithm
812 * is to start at 1K of scsi malloc space per-command and
813 * loop through all factors of the PAGE_SIZE and pick the best.
816 for (cur_size = 1024; cur_size <= PAGE_SIZE; cur_size *= 2) {
819 nseg = cur_size / sizeof(struct scatterlist);
820 if (nseg < AHD_LINUX_MIN_NSEG)
823 if (best_size == 0) {
824 best_size = cur_size;
825 ahd_linux_nseg = nseg;
831 * Compare the traits of the current "best_size"
832 * with the current size to determine if the
833 * current size is a better size.
835 best_rem = best_size % sizeof(struct scatterlist);
836 cur_rem = cur_size % sizeof(struct scatterlist);
837 if (cur_rem < best_rem) {
838 best_size = cur_size;
839 ahd_linux_nseg = nseg;
847 * Try to detect an Adaptec 79XX controller.
850 ahd_linux_detect(Scsi_Host_Template *template)
852 struct ahd_softc *ahd;
856 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
858 * It is a bug that the upper layer takes
859 * this lock just prior to calling us.
861 spin_unlock_irq(&io_request_lock);
865 * Sanity checking of Linux SCSI data structures so
866 * that some of our hacks^H^H^H^H^Hassumptions aren't
869 if (offsetof(struct ahd_cmd_internal, end)
870 > offsetof(struct scsi_cmnd, host_scribble)) {
871 printf("ahd_linux_detect: SCSI data structures changed.\n");
872 printf("ahd_linux_detect: Unable to attach\n");
876 * Determine an appropriate size for our Scatter Gatther lists.
878 ahd_linux_size_nseg();
881 * If we've been passed any parameters, process them now.
884 aic79xx_setup(aic79xx);
885 if (dummy_buffer[0] != 'P')
887 "aic79xx: Please read the file /usr/src/linux/drivers/scsi/README.aic79xx\n"
888 "aic79xx: to see the proper way to specify options to the aic79xx module\n"
889 "aic79xx: Specifically, don't use any commas when passing arguments to\n"
890 "aic79xx: insmod or else it might trash certain memory areas.\n");
893 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,0)
894 template->proc_name = "aic79xx";
896 template->proc_dir = &proc_scsi_aic79xx;
900 * Initialize our softc list lock prior to
901 * probing for any adapters.
906 error = ahd_linux_pci_init();
912 * Register with the SCSI layer all
913 * controllers we've found.
916 TAILQ_FOREACH(ahd, &ahd_tailq, links) {
918 if (ahd_linux_register_host(ahd, template) == 0)
921 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
922 spin_lock_irq(&io_request_lock);
924 aic79xx_detect_complete++;
928 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
930 * Free the passed in Scsi_Host memory structures prior to unloading the
934 ahd_linux_release(struct Scsi_Host * host)
936 struct ahd_softc *ahd;
943 * We should be able to just perform
944 * the free directly, but check our
945 * list for extra sanity.
947 ahd = ahd_find_softc(*(struct ahd_softc **)host->hostdata);
952 ahd_intr_enable(ahd, FALSE);
963 * Return a string describing the driver.
966 ahd_linux_info(struct Scsi_Host *host)
968 static char buffer[512];
971 struct ahd_softc *ahd;
974 ahd = *(struct ahd_softc **)host->hostdata;
975 memset(bp, 0, sizeof(buffer));
976 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
977 strcat(bp, AIC79XX_DRIVER_VERSION);
980 strcat(bp, ahd->description);
983 ahd_controller_info(ahd, ahd_info);
984 strcat(bp, ahd_info);
991 * Queue an SCB to the controller.
994 ahd_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *))
996 struct ahd_softc *ahd;
997 struct ahd_linux_device *dev;
1000 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
1003 * Save the callback on completion function.
1005 cmd->scsi_done = scsi_done;
1007 ahd_midlayer_entrypoint_lock(ahd, &flags);
1010 * Close the race of a command that was in the process of
1011 * being queued to us just as our simq was frozen. Let
1012 * DV commands through so long as we are only frozen to
1015 if (ahd->platform_data->qfrozen != 0
1016 && AHD_DV_CMD(cmd) == 0) {
1018 ahd_cmd_set_transaction_status(cmd, CAM_REQUEUE_REQ);
1019 ahd_linux_queue_cmd_complete(ahd, cmd);
1020 ahd_schedule_completeq(ahd);
1021 ahd_midlayer_entrypoint_unlock(ahd, &flags);
1024 dev = ahd_linux_get_device(ahd, cmd->device->channel,
1025 cmd->device->id, cmd->device->lun,
1028 ahd_cmd_set_transaction_status(cmd, CAM_RESRC_UNAVAIL);
1029 ahd_linux_queue_cmd_complete(ahd, cmd);
1030 ahd_schedule_completeq(ahd);
1031 ahd_midlayer_entrypoint_unlock(ahd, &flags);
1032 printf("%s: aic79xx_linux_queue - Unable to allocate device!\n",
1036 if (cmd->cmd_len > MAX_CDB_LEN)
1038 cmd->result = CAM_REQ_INPROG << 16;
1039 TAILQ_INSERT_TAIL(&dev->busyq, (struct ahd_cmd *)cmd, acmd_links.tqe);
1040 if ((dev->flags & AHD_DEV_ON_RUN_LIST) == 0) {
1041 TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq, dev, links);
1042 dev->flags |= AHD_DEV_ON_RUN_LIST;
1043 ahd_linux_run_device_queues(ahd);
1045 ahd_midlayer_entrypoint_unlock(ahd, &flags);
1049 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
1051 ahd_linux_slave_alloc(Scsi_Device *device)
1053 struct ahd_softc *ahd;
1055 ahd = *((struct ahd_softc **)device->host->hostdata);
1057 printf("%s: Slave Alloc %d\n", ahd_name(ahd), device->id);
1062 ahd_linux_slave_configure(Scsi_Device *device)
1064 struct ahd_softc *ahd;
1065 struct ahd_linux_device *dev;
1068 ahd = *((struct ahd_softc **)device->host->hostdata);
1070 printf("%s: Slave Configure %d\n", ahd_name(ahd), device->id);
1071 ahd_midlayer_entrypoint_lock(ahd, &flags);
1073 * Since Linux has attached to the device, configure
1074 * it so we don't free and allocate the device
1075 * structure on every command.
1077 dev = ahd_linux_get_device(ahd, device->channel,
1078 device->id, device->lun,
1081 dev->flags &= ~AHD_DEV_UNCONFIGURED;
1082 dev->flags |= AHD_DEV_SLAVE_CONFIGURED;
1083 dev->scsi_device = device;
1084 ahd_linux_device_queue_depth(ahd, dev);
1086 ahd_midlayer_entrypoint_unlock(ahd, &flags);
1091 ahd_linux_slave_destroy(Scsi_Device *device)
1093 struct ahd_softc *ahd;
1094 struct ahd_linux_device *dev;
1097 ahd = *((struct ahd_softc **)device->host->hostdata);
1099 printf("%s: Slave Destroy %d\n", ahd_name(ahd), device->id);
1100 ahd_midlayer_entrypoint_lock(ahd, &flags);
1101 dev = ahd_linux_get_device(ahd, device->channel,
1102 device->id, device->lun,
1106 * Filter out "silly" deletions of real devices by only
1107 * deleting devices that have had slave_configure()
1108 * called on them. All other devices that have not
1109 * been configured will automatically be deleted by
1110 * the refcounting process.
1113 && (dev->flags & AHD_DEV_SLAVE_CONFIGURED) != 0) {
1114 dev->flags |= AHD_DEV_UNCONFIGURED;
1115 if (TAILQ_EMPTY(&dev->busyq)
1117 && (dev->flags & AHD_DEV_TIMER_ACTIVE) == 0)
1118 ahd_linux_free_device(ahd, dev);
1120 ahd_midlayer_entrypoint_unlock(ahd, &flags);
1124 * Sets the queue depth for each SCSI device hanging
1125 * off the input host adapter.
1128 ahd_linux_select_queue_depth(struct Scsi_Host * host,
1129 Scsi_Device * scsi_devs)
1131 Scsi_Device *device;
1133 struct ahd_softc *ahd;
1136 ahd = *((struct ahd_softc **)host->hostdata);
1137 ahd_lock(ahd, &flags);
1138 for (device = scsi_devs; device != NULL; device = device->next) {
1141 * Watch out for duplicate devices. This works around
1142 * some quirks in how the SCSI scanning code does its
1143 * device management.
1145 for (ldev = scsi_devs; ldev != device; ldev = ldev->next) {
1146 if (ldev->host == device->host
1147 && ldev->channel == device->channel
1148 && ldev->id == device->id
1149 && ldev->lun == device->lun)
1152 /* Skip duplicate. */
1156 if (device->host == host) {
1157 struct ahd_linux_device *dev;
1160 * Since Linux has attached to the device, configure
1161 * it so we don't free and allocate the device
1162 * structure on every command.
1164 dev = ahd_linux_get_device(ahd, device->channel,
1165 device->id, device->lun,
1168 dev->flags &= ~AHD_DEV_UNCONFIGURED;
1169 dev->scsi_device = device;
1170 ahd_linux_device_queue_depth(ahd, dev);
1171 device->queue_depth = dev->openings
1173 if ((dev->flags & (AHD_DEV_Q_BASIC
1174 | AHD_DEV_Q_TAGGED)) == 0) {
1176 * We allow the OS to queue 2 untagged
1177 * transactions to us at any time even
1178 * though we can only execute them
1179 * serially on the controller/device.
1180 * This should remove some latency.
1182 device->queue_depth = 2;
1187 ahd_unlock(ahd, &flags);
1191 #if defined(__i386__)
1193 * Return the disk geometry for the given SCSI device.
1196 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
1197 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
1198 sector_t capacity, int geom[])
1202 ahd_linux_biosparam(Disk *disk, kdev_t dev, int geom[])
1204 struct scsi_device *sdev = disk->device;
1205 u_long capacity = disk->capacity;
1206 struct buffer_head *bh;
1213 struct ahd_softc *ahd;
1215 ahd = *((struct ahd_softc **)sdev->host->hostdata);
1217 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
1218 bh = scsi_bios_ptable(bdev);
1219 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,17)
1220 bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, block_size(dev));
1222 bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, 1024);
1226 ret = scsi_partsize(bh, capacity,
1227 &geom[2], &geom[0], &geom[1]);
1228 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
1238 cylinders = aic_sector_div(capacity, heads, sectors);
1240 if (aic79xx_extended != 0)
1243 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
1244 if (extended && cylinders >= 1024) {
1247 cylinders = aic_sector_div(capacity, heads, sectors);
1251 geom[2] = cylinders;
1257 * Abort the current SCSI command(s).
1260 ahd_linux_abort(Scsi_Cmnd *cmd)
1262 struct ahd_softc *ahd;
1263 struct ahd_cmd *acmd;
1264 struct ahd_cmd *list_acmd;
1265 struct ahd_linux_device *dev;
1266 struct scb *pending_scb;
1269 u_int active_scbptr;
1277 ahd_mode_state saved_modes;
1282 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
1283 acmd = (struct ahd_cmd *)cmd;
1285 printf("%s:%d:%d:%d: Attempting to abort cmd %p:",
1286 ahd_name(ahd), cmd->device->channel, cmd->device->id,
1287 cmd->device->lun, cmd);
1288 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
1289 printf(" 0x%x", cmd->cmnd[cdb_byte]);
1293 * In all versions of Linux, we have to work around
1294 * a major flaw in how the mid-layer is locked down
1295 * if we are to sleep successfully in our error handler
1296 * while allowing our interrupt handler to run. Since
1297 * the midlayer acquires either the io_request_lock or
1298 * our lock prior to calling us, we must use the
1299 * spin_unlock_irq() method for unlocking our lock.
1300 * This will force interrupts to be enabled on the
1301 * current CPU. Since the EH thread should not have
1302 * been running with CPU interrupts disabled other than
1303 * by acquiring either the io_request_lock or our own
1304 * lock, this *should* be safe.
1306 ahd_midlayer_entrypoint_lock(ahd, &s);
1309 * First determine if we currently own this command.
1310 * Start by searching the device queue. If not found
1311 * there, check the pending_scb list. If not found
1312 * at all, and the system wanted us to just abort the
1313 * command, return success.
1315 dev = ahd_linux_get_device(ahd, cmd->device->channel,
1316 cmd->device->id, cmd->device->lun,
1321 * No target device for this command exists,
1322 * so we must not still own the command.
1324 printf("%s:%d:%d:%d: Is not an active device\n",
1325 ahd_name(ahd), cmd->device->channel, cmd->device->id,
1331 TAILQ_FOREACH(list_acmd, &dev->busyq, acmd_links.tqe) {
1332 if (list_acmd == acmd)
1336 if (list_acmd != NULL) {
1337 printf("%s:%d:%d:%d: Command found on device queue\n",
1338 ahd_name(ahd), cmd->device->channel, cmd->device->id,
1340 TAILQ_REMOVE(&dev->busyq, list_acmd, acmd_links.tqe);
1341 cmd->result = DID_ABORT << 16;
1342 ahd_linux_queue_cmd_complete(ahd, cmd);
1348 * See if we can find a matching cmd in the pending list.
1350 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
1351 if (pending_scb->io_ctx == cmd)
1355 if (pending_scb == NULL) {
1356 printf("%s:%d:%d:%d: Command not found\n",
1357 ahd_name(ahd), cmd->device->channel, cmd->device->id,
1362 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
1364 * We can't queue two recovery actions using the same SCB
1371 * Ensure that the card doesn't do anything
1372 * behind our back. Also make sure that we
1373 * didn't "just" miss an interrupt that would
1376 was_paused = ahd_is_paused(ahd);
1377 ahd_pause_and_flushwork(ahd);
1380 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
1381 printf("%s:%d:%d:%d: Command already completed\n",
1382 ahd_name(ahd), cmd->device->channel, cmd->device->id,
1387 printf("%s: At time of recovery, card was %spaused\n",
1388 ahd_name(ahd), was_paused ? "" : "not ");
1389 ahd_dump_card_state(ahd);
1391 disconnected = TRUE;
1392 if (ahd_search_qinfifo(ahd, cmd->device->id, cmd->device->channel + 'A',
1393 cmd->device->lun, SCB_GET_TAG(pending_scb),
1394 ROLE_INITIATOR, CAM_REQ_ABORTED,
1395 SEARCH_COMPLETE) > 0) {
1396 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
1397 ahd_name(ahd), cmd->device->channel, cmd->device->id,
1403 saved_modes = ahd_save_modes(ahd);
1404 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
1405 last_phase = ahd_inb(ahd, LASTPHASE);
1406 saved_scbptr = ahd_get_scbptr(ahd);
1407 active_scbptr = saved_scbptr;
1408 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
1409 struct scb *bus_scb;
1411 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
1412 if (bus_scb == pending_scb)
1413 disconnected = FALSE;
1417 * At this point, pending_scb is the scb associated with the
1418 * passed in command. That command is currently active on the
1419 * bus or is in the disconnected state.
1421 if (last_phase != P_BUSFREE
1422 && SCB_GET_TAG(pending_scb) == active_scbptr) {
1425 * We're active on the bus, so assert ATN
1426 * and hope that the target responds.
1428 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
1429 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
1430 ahd_outb(ahd, MSG_OUT, HOST_MSG);
1431 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
1432 printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
1433 ahd_name(ahd), cmd->device->channel,
1434 cmd->device->id, cmd->device->lun);
1436 } else if (disconnected) {
1439 * Actually re-queue this SCB in an attempt
1440 * to select the device before it reconnects.
1442 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
1443 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
1444 pending_scb->hscb->cdb_len = 0;
1445 pending_scb->hscb->task_attribute = 0;
1446 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
1448 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
1450 * Mark the SCB has having an outstanding
1451 * task management function. Should the command
1452 * complete normally before the task management
1453 * function can be sent, the host will be notified
1454 * to abort our requeued SCB.
1456 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
1457 pending_scb->hscb->task_management);
1460 * If non-packetized, set the MK_MESSAGE control
1461 * bit indicating that we desire to send a message.
1462 * We also set the disconnected flag since there is
1463 * no guarantee that our SCB control byte matches
1464 * the version on the card. We don't want the
1465 * sequencer to abort the command thinking an
1466 * unsolicited reselection occurred.
1468 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
1471 * The sequencer will never re-reference the
1472 * in-core SCB. To make sure we are notified
1473 * during reslection, set the MK_MESSAGE flag in
1474 * the card's copy of the SCB.
1476 ahd_outb(ahd, SCB_CONTROL,
1477 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
1481 * Clear out any entries in the QINFIFO first
1482 * so we are the next SCB for this target
1485 ahd_search_qinfifo(ahd, cmd->device->id,
1486 cmd->device->channel + 'A', cmd->device->lun,
1487 SCB_LIST_NULL, ROLE_INITIATOR,
1488 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
1489 ahd_qinfifo_requeue_tail(ahd, pending_scb);
1490 ahd_set_scbptr(ahd, saved_scbptr);
1491 ahd_print_path(ahd, pending_scb);
1492 printf("Device is disconnected, re-queuing SCB\n");
1495 printf("%s:%d:%d:%d: Unable to deliver message\n",
1496 ahd_name(ahd), cmd->device->channel,
1497 cmd->device->id, cmd->device->lun);
1504 * Our assumption is that if we don't have the command, no
1505 * recovery action was required, so we return success. Again,
1506 * the semantics of the mid-layer recovery engine are not
1507 * well defined, so this may change in time.
1514 struct timer_list timer;
1517 pending_scb->platform_data->flags |= AHD_SCB_UP_EH_SEM;
1518 spin_unlock_irq(&ahd->platform_data->spin_lock);
1520 timer.data = (u_long)pending_scb;
1521 timer.expires = jiffies + (5 * HZ);
1522 timer.function = ahd_linux_sem_timeout;
1524 printf("Recovery code sleeping\n");
1525 down(&ahd->platform_data->eh_sem);
1526 printf("Recovery code awake\n");
1527 ret = del_timer_sync(&timer);
1529 printf("Timer Expired\n");
1532 spin_lock_irq(&ahd->platform_data->spin_lock);
1534 ahd_schedule_runq(ahd);
1535 ahd_linux_run_complete_queue(ahd);
1536 ahd_midlayer_entrypoint_unlock(ahd, &s);
1542 ahd_linux_dev_reset_complete(Scsi_Cmnd *cmd)
1544 free(cmd, M_DEVBUF);
1548 * Attempt to send a target reset message to the device that timed out.
1551 ahd_linux_dev_reset(Scsi_Cmnd *cmd)
1553 struct ahd_softc *ahd;
1554 struct scsi_cmnd *recovery_cmd;
1555 struct ahd_linux_device *dev;
1556 struct ahd_initiator_tinfo *tinfo;
1557 struct ahd_tmode_tstate *tstate;
1559 struct hardware_scb *hscb;
1561 struct timer_list timer;
1564 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
1565 recovery_cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK);
1568 memset(recovery_cmd, 0, sizeof(struct scsi_cmnd));
1569 recovery_cmd->device = cmd->device;
1570 recovery_cmd->scsi_done = ahd_linux_dev_reset_complete;
1572 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
1573 printf("%s:%d:%d:%d: Device reset called for cmd %p\n",
1574 ahd_name(ahd), cmd->device->channel, cmd->device->id,
1575 cmd->device->lun, cmd);
1577 ahd_midlayer_entrypoint_lock(ahd, &s);
1579 dev = ahd_linux_get_device(ahd, cmd->device->channel, cmd->device->id,
1580 cmd->device->lun, /*alloc*/FALSE);
1582 ahd_midlayer_entrypoint_unlock(ahd, &s);
1583 kfree(recovery_cmd);
1586 if ((scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX)) == NULL) {
1587 ahd_midlayer_entrypoint_unlock(ahd, &s);
1588 kfree(recovery_cmd);
1591 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1592 cmd->device->id, &tstate);
1593 recovery_cmd->result = CAM_REQ_INPROG << 16;
1594 recovery_cmd->host_scribble = (char *)scb;
1595 scb->io_ctx = recovery_cmd;
1596 scb->platform_data->dev = dev;
1598 ahd_set_residual(scb, 0);
1599 ahd_set_sense_residual(scb, 0);
1602 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1603 hscb->lun = cmd->device->lun;
1605 hscb->task_management = SIU_TASKMGMT_LUN_RESET;
1606 scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
1607 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1608 scb->flags |= SCB_PACKETIZED;
1610 hscb->control |= MK_MESSAGE;
1614 dev->commands_issued++;
1615 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1616 ahd_queue_scb(ahd, scb);
1618 scb->platform_data->flags |= AHD_SCB_UP_EH_SEM;
1619 spin_unlock_irq(&ahd->platform_data->spin_lock);
1621 timer.data = (u_long)scb;
1622 timer.expires = jiffies + (5 * HZ);
1623 timer.function = ahd_linux_sem_timeout;
1625 printf("Recovery code sleeping\n");
1626 down(&ahd->platform_data->eh_sem);
1627 printf("Recovery code awake\n");
1629 if (del_timer_sync(&timer) == 0) {
1630 printf("Timer Expired\n");
1633 spin_lock_irq(&ahd->platform_data->spin_lock);
1634 ahd_schedule_runq(ahd);
1635 ahd_linux_run_complete_queue(ahd);
1636 ahd_midlayer_entrypoint_unlock(ahd, &s);
1637 printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
1642 * Reset the SCSI bus.
1645 ahd_linux_bus_reset(Scsi_Cmnd *cmd)
1647 struct ahd_softc *ahd;
1651 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
1653 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
1654 printf("%s: Bus reset called for cmd %p\n",
1655 ahd_name(ahd), cmd);
1657 ahd_midlayer_entrypoint_lock(ahd, &s);
1658 found = ahd_reset_channel(ahd, cmd->device->channel + 'A',
1659 /*initiate reset*/TRUE);
1660 ahd_linux_run_complete_queue(ahd);
1661 ahd_midlayer_entrypoint_unlock(ahd, &s);
1664 printf("%s: SCSI bus reset delivered. "
1665 "%d SCBs aborted.\n", ahd_name(ahd), found);
1670 Scsi_Host_Template aic79xx_driver_template = {
1671 .module = THIS_MODULE,
1673 .proc_info = ahd_linux_proc_info,
1674 .info = ahd_linux_info,
1675 .queuecommand = ahd_linux_queue,
1676 .eh_abort_handler = ahd_linux_abort,
1677 .eh_device_reset_handler = ahd_linux_dev_reset,
1678 .eh_bus_reset_handler = ahd_linux_bus_reset,
1679 #if defined(__i386__)
1680 .bios_param = ahd_linux_biosparam,
1682 .can_queue = AHD_MAX_QUEUE,
1685 .use_clustering = ENABLE_CLUSTERING,
1686 .slave_alloc = ahd_linux_slave_alloc,
1687 .slave_configure = ahd_linux_slave_configure,
1688 .slave_destroy = ahd_linux_slave_destroy,
1691 /**************************** Tasklet Handler *********************************/
1694 * In 2.4.X and above, this routine is called from a tasklet,
1695 * so we must re-acquire our lock prior to executing this code.
1696 * In all prior kernels, ahd_schedule_runq() calls this routine
1697 * directly and ahd_schedule_runq() is called with our lock held.
1700 ahd_runq_tasklet(unsigned long data)
1702 struct ahd_softc* ahd;
1703 struct ahd_linux_device *dev;
1704 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
1708 ahd = (struct ahd_softc *)data;
1709 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
1710 ahd_lock(ahd, &flags);
1712 while ((dev = ahd_linux_next_device_to_run(ahd)) != NULL) {
1714 TAILQ_REMOVE(&ahd->platform_data->device_runq, dev, links);
1715 dev->flags &= ~AHD_DEV_ON_RUN_LIST;
1716 ahd_linux_check_device_queue(ahd, dev);
1717 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
1718 /* Yeild to our interrupt handler */
1719 ahd_unlock(ahd, &flags);
1720 ahd_lock(ahd, &flags);
1723 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
1724 ahd_unlock(ahd, &flags);
1728 /******************************** Bus DMA *************************************/
1730 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
1731 bus_size_t alignment, bus_size_t boundary,
1732 bus_addr_t lowaddr, bus_addr_t highaddr,
1733 bus_dma_filter_t *filter, void *filterarg,
1734 bus_size_t maxsize, int nsegments,
1735 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
1739 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
1744 * Linux is very simplistic about DMA memory. For now don't
1745 * maintain all specification information. Once Linux supplies
1746 * better facilities for doing these operations, or the
1747 * needs of this particular driver change, we might need to do
1750 dmat->alignment = alignment;
1751 dmat->boundary = boundary;
1752 dmat->maxsize = maxsize;
1758 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
1760 free(dmat, M_DEVBUF);
1764 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
1765 int flags, bus_dmamap_t *mapp)
1769 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
1770 map = malloc(sizeof(*map), M_DEVBUF, M_NOWAIT);
1774 * Although we can dma data above 4GB, our
1775 * "consistent" memory is below 4GB for
1776 * space efficiency reasons (only need a 4byte
1777 * address). For this reason, we have to reset
1778 * our dma mask when doing allocations.
1780 if (ahd->dev_softc != NULL)
1781 if (ahd_pci_set_dma_mask(ahd->dev_softc, 0xFFFFFFFF)) {
1782 printk(KERN_WARNING "aic79xx: No suitable DMA available.\n");
1786 *vaddr = pci_alloc_consistent(ahd->dev_softc,
1787 dmat->maxsize, &map->bus_addr);
1788 if (ahd->dev_softc != NULL)
1789 if (ahd_pci_set_dma_mask(ahd->dev_softc,
1790 ahd->platform_data->hw_dma_mask)) {
1791 printk(KERN_WARNING "aic79xx: No suitable DMA available.\n");
1795 #else /* LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0) */
1797 * At least in 2.2.14, malloc is a slab allocator so all
1798 * allocations are aligned. We assume for these kernel versions
1799 * that all allocations will be bellow 4Gig, physically contiguous,
1800 * and accessible via DMA by the controller.
1802 map = NULL; /* No additional information to store */
1803 *vaddr = malloc(dmat->maxsize, M_DEVBUF, M_NOWAIT);
1812 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
1813 void* vaddr, bus_dmamap_t map)
1815 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
1816 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
1817 vaddr, map->bus_addr);
1819 free(vaddr, M_DEVBUF);
1824 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
1825 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
1826 void *cb_arg, int flags)
1829 * Assume for now that this will only be used during
1830 * initialization and not for per-transaction buffer mapping.
1832 bus_dma_segment_t stack_sg;
1834 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
1835 stack_sg.ds_addr = map->bus_addr;
1837 #define VIRT_TO_BUS(a) (uint32_t)virt_to_bus((void *)(a))
1838 stack_sg.ds_addr = VIRT_TO_BUS(buf);
1840 stack_sg.ds_len = dmat->maxsize;
1841 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
1846 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1849 * The map may is NULL in our < 2.3.X implementation.
1852 free(map, M_DEVBUF);
1856 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1862 /********************* Platform Dependent Functions ***************************/
1864 * Compare "left hand" softc with "right hand" softc, returning:
1865 * < 0 - lahd has a lower priority than rahd
1866 * 0 - Softcs are equal
1867 * > 0 - lahd has a higher priority than rahd
1870 ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd)
1875 * Under Linux, cards are ordered as follows:
1876 * 1) PCI devices that are marked as the boot controller.
1877 * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
1878 * 3) All remaining PCI devices sorted by bus/slot/func.
1881 value = (lahd->flags & AHD_BOOT_CHANNEL)
1882 - (rahd->flags & AHD_BOOT_CHANNEL);
1884 /* Controllers set for boot have a *higher* priority */
1888 value = (lahd->flags & AHD_BIOS_ENABLED)
1889 - (rahd->flags & AHD_BIOS_ENABLED);
1891 /* Controllers with BIOS enabled have a *higher* priority */
1894 /* Still equal. Sort by bus/slot/func. */
1895 if (aic79xx_reverse_scan != 0)
1896 value = ahd_get_pci_bus(lahd->dev_softc)
1897 - ahd_get_pci_bus(rahd->dev_softc);
1899 value = ahd_get_pci_bus(rahd->dev_softc)
1900 - ahd_get_pci_bus(lahd->dev_softc);
1903 if (aic79xx_reverse_scan != 0)
1904 value = ahd_get_pci_slot(lahd->dev_softc)
1905 - ahd_get_pci_slot(rahd->dev_softc);
1907 value = ahd_get_pci_slot(rahd->dev_softc)
1908 - ahd_get_pci_slot(lahd->dev_softc);
1912 value = rahd->channel - lahd->channel;
1917 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1920 if ((instance >= 0) && (targ >= 0)
1921 && (instance < NUM_ELEMENTS(aic79xx_tag_info))
1922 && (targ < AHD_NUM_TARGETS)) {
1923 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1925 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
1930 ahd_linux_setup_rd_strm_info(u_long arg, int instance, int targ, int32_t value)
1933 && (instance < NUM_ELEMENTS(aic79xx_rd_strm_info))) {
1934 aic79xx_rd_strm_info[instance] = value & 0xFFFF;
1936 printf("rd_strm[%d] = 0x%x\n", instance, value);
1941 ahd_linux_setup_dv(u_long arg, int instance, int targ, int32_t value)
1944 && (instance < NUM_ELEMENTS(aic79xx_dv_settings))) {
1945 aic79xx_dv_settings[instance] = value;
1947 printf("dv[%d] = %d\n", instance, value);
1952 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
1956 && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
1957 uint8_t *iocell_info;
1959 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1960 iocell_info[index] = value & 0xFFFF;
1962 printf("iocell[%d:%ld] = %d\n", instance, index, value);
1967 ahd_linux_setup_tag_info_global(char *p)
1971 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1972 printf("Setting Global Tags= %d\n", tags);
1974 for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
1975 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1976 aic79xx_tag_info[i].tag_commands[j] = tags;
1982 * Handle Linux boot parameters. This routine allows for assigning a value
1983 * to a parameter with a ':' between the parameter and the value.
1984 * ie. aic79xx=stpwlev:1,extended
1987 aic79xx_setup(char *s)
1997 { "extended", &aic79xx_extended },
1998 { "no_reset", &aic79xx_no_reset },
1999 { "verbose", &aic79xx_verbose },
2000 { "allow_memio", &aic79xx_allow_memio},
2002 { "debug", &ahd_debug },
2004 { "reverse_scan", &aic79xx_reverse_scan },
2005 { "periodic_otag", &aic79xx_periodic_otag },
2006 { "pci_parity", &aic79xx_pci_parity },
2007 { "seltime", &aic79xx_seltime },
2008 { "tag_info", NULL },
2009 { "global_tag_depth", NULL},
2010 { "rd_strm", NULL },
2012 { "slewrate", NULL },
2013 { "precomp", NULL },
2014 { "amplitude", NULL },
2017 end = strchr(s, '\0');
2020 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
2021 * will never be 0 in this case.
2025 while ((p = strsep(&s, ",.")) != NULL) {
2028 for (i = 0; i < NUM_ELEMENTS(options); i++) {
2030 n = strlen(options[i].name);
2031 if (strncmp(options[i].name, p, n) == 0)
2034 if (i == NUM_ELEMENTS(options))
2037 if (strncmp(p, "global_tag_depth", n) == 0) {
2038 ahd_linux_setup_tag_info_global(p + n);
2039 } else if (strncmp(p, "tag_info", n) == 0) {
2040 s = aic_parse_brace_option("tag_info", p + n, end,
2041 2, ahd_linux_setup_tag_info, 0);
2042 } else if (strncmp(p, "rd_strm", n) == 0) {
2043 s = aic_parse_brace_option("rd_strm", p + n, end,
2044 1, ahd_linux_setup_rd_strm_info, 0);
2045 } else if (strncmp(p, "dv", n) == 0) {
2046 s = aic_parse_brace_option("dv", p + n, end, 1,
2047 ahd_linux_setup_dv, 0);
2048 } else if (strncmp(p, "slewrate", n) == 0) {
2049 s = aic_parse_brace_option("slewrate",
2050 p + n, end, 1, ahd_linux_setup_iocell_info,
2051 AIC79XX_SLEWRATE_INDEX);
2052 } else if (strncmp(p, "precomp", n) == 0) {
2053 s = aic_parse_brace_option("precomp",
2054 p + n, end, 1, ahd_linux_setup_iocell_info,
2055 AIC79XX_PRECOMP_INDEX);
2056 } else if (strncmp(p, "amplitude", n) == 0) {
2057 s = aic_parse_brace_option("amplitude",
2058 p + n, end, 1, ahd_linux_setup_iocell_info,
2059 AIC79XX_AMPLITUDE_INDEX);
2060 } else if (p[n] == ':') {
2061 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
2062 } else if (!strncmp(p, "verbose", n)) {
2063 *(options[i].flag) = 1;
2065 *(options[i].flag) ^= 0xFFFFFFFF;
2071 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,0)
2072 __setup("aic79xx=", aic79xx_setup);
2075 uint32_t aic79xx_verbose;
2078 ahd_linux_register_host(struct ahd_softc *ahd, Scsi_Host_Template *template)
2081 struct Scsi_Host *host;
2086 template->name = ahd->description;
2087 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
2091 *((struct ahd_softc **)host->hostdata) = ahd;
2093 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
2094 scsi_assign_lock(host, &ahd->platform_data->spin_lock);
2095 #elif AHD_SCSI_HAS_HOST_LOCK != 0
2096 host->lock = &ahd->platform_data->spin_lock;
2098 ahd->platform_data->host = host;
2099 host->can_queue = AHD_MAX_QUEUE;
2100 host->cmd_per_lun = 2;
2101 host->sg_tablesize = AHD_NSEG;
2102 host->this_id = ahd->our_id;
2103 host->irq = ahd->platform_data->irq;
2104 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
2105 host->max_lun = AHD_NUM_LUNS;
2106 host->max_channel = 0;
2107 host->sg_tablesize = AHD_NSEG;
2108 ahd_set_unit(ahd, ahd_linux_next_unit());
2109 sprintf(buf, "scsi%d", host->host_no);
2110 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
2111 if (new_name != NULL) {
2112 strcpy(new_name, buf);
2113 ahd_set_name(ahd, new_name);
2115 host->unique_id = ahd->unit;
2116 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,4) && \
2117 LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
2118 scsi_set_pci_device(host, ahd->dev_softc);
2120 ahd_linux_setup_user_rd_strm_settings(ahd);
2121 ahd_linux_initialize_scsi_bus(ahd);
2122 ahd_unlock(ahd, &s);
2123 ahd->platform_data->dv_pid = kernel_thread(ahd_linux_dv_thread, ahd, 0);
2125 if (ahd->platform_data->dv_pid < 0) {
2126 printf("%s: Failed to create DV thread, error= %d\n",
2127 ahd_name(ahd), ahd->platform_data->dv_pid);
2128 return (-ahd->platform_data->dv_pid);
2131 * Initially allocate *all* of our linux target objects
2132 * so that the DV thread will scan them all in parallel
2133 * just after driver initialization. Any device that
2134 * does not exist will have its target object destroyed
2135 * by the selection timeout handler. In the case of a
2136 * device that appears after the initial DV scan, async
2137 * negotiation will occur for the first command, and DV
2138 * will comence should that first command be successful.
2140 for (target = 0; target < host->max_id; target++) {
2143 * Skip our own ID. Some Compaq/HP storage devices
2144 * have enclosure management devices that respond to
2145 * single bit selection (i.e. selecting ourselves).
2146 * It is expected that either an external application
2147 * or a modified kernel will be used to probe this
2148 * ID if it is appropriate. To accommodate these
2149 * installations, ahc_linux_alloc_target() will allocate
2150 * for our ID if asked to do so.
2152 if (target == ahd->our_id)
2155 ahd_linux_alloc_target(ahd, 0, target);
2157 ahd_intr_enable(ahd, TRUE);
2158 ahd_linux_start_dv(ahd);
2159 ahd_unlock(ahd, &s);
2161 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
2162 scsi_add_host(host, &ahd->dev_softc->dev); /* XXX handle failure */
2163 scsi_scan_host(host);
2169 ahd_linux_get_memsize(void)
2174 return ((uint64_t)si.totalram << PAGE_SHIFT);
2178 * Find the smallest available unit number to use
2179 * for a new device. We don't just use a static
2180 * count to handle the "repeated hot-(un)plug"
2184 ahd_linux_next_unit(void)
2186 struct ahd_softc *ahd;
2191 TAILQ_FOREACH(ahd, &ahd_tailq, links) {
2192 if (ahd->unit == unit) {
2201 * Place the SCSI bus into a known state by either resetting it,
2202 * or forcing transfer negotiations on the next command to any
2206 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
2214 if (aic79xx_no_reset != 0)
2215 ahd->flags &= ~AHD_RESET_BUS_A;
2217 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
2218 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
2220 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
2223 * Force negotiation to async for all targets that
2224 * will not see an initial bus reset.
2226 for (; target_id < numtarg; target_id++) {
2227 struct ahd_devinfo devinfo;
2228 struct ahd_initiator_tinfo *tinfo;
2229 struct ahd_tmode_tstate *tstate;
2231 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
2232 target_id, &tstate);
2233 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
2234 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
2235 ahd_update_neg_request(ahd, &devinfo, tstate,
2236 tinfo, AHD_NEG_ALWAYS);
2238 /* Give the bus some time to recover */
2239 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
2240 ahd_freeze_simq(ahd);
2241 init_timer(&ahd->platform_data->reset_timer);
2242 ahd->platform_data->reset_timer.data = (u_long)ahd;
2243 ahd->platform_data->reset_timer.expires =
2244 jiffies + (AIC79XX_RESET_DELAY * HZ)/1000;
2245 ahd->platform_data->reset_timer.function =
2246 (ahd_linux_callback_t *)ahd_release_simq;
2247 add_timer(&ahd->platform_data->reset_timer);
2252 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
2254 ahd->platform_data =
2255 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
2256 if (ahd->platform_data == NULL)
2258 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
2259 TAILQ_INIT(&ahd->platform_data->completeq);
2260 TAILQ_INIT(&ahd->platform_data->device_runq);
2261 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
2262 ahd->platform_data->hw_dma_mask = 0xFFFFFFFF;
2264 ahd_done_lockinit(ahd);
2265 init_timer(&ahd->platform_data->completeq_timer);
2266 ahd->platform_data->completeq_timer.data = (u_long)ahd;
2267 ahd->platform_data->completeq_timer.function =
2268 (ahd_linux_callback_t *)ahd_linux_thread_run_complete_queue;
2269 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
2270 init_MUTEX_LOCKED(&ahd->platform_data->eh_sem);
2271 init_MUTEX_LOCKED(&ahd->platform_data->dv_sem);
2272 init_MUTEX_LOCKED(&ahd->platform_data->dv_cmd_sem);
2274 ahd->platform_data->eh_sem = MUTEX_LOCKED;
2275 ahd->platform_data->dv_sem = MUTEX_LOCKED;
2276 ahd->platform_data->dv_cmd_sem = MUTEX_LOCKED;
2278 ahd_setup_runq_tasklet(ahd);
2279 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
2284 ahd_platform_free(struct ahd_softc *ahd)
2286 struct ahd_linux_target *targ;
2287 struct ahd_linux_device *dev;
2290 if (ahd->platform_data != NULL) {
2291 del_timer_sync(&ahd->platform_data->completeq_timer);
2292 ahd_linux_kill_dv_thread(ahd);
2293 ahd_teardown_runq_tasklet(ahd);
2294 if (ahd->platform_data->host != NULL) {
2295 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
2296 scsi_remove_host(ahd->platform_data->host);
2298 scsi_host_put(ahd->platform_data->host);
2301 /* destroy all of the device and target objects */
2302 for (i = 0; i < AHD_NUM_TARGETS; i++) {
2303 targ = ahd->platform_data->targets[i];
2305 /* Keep target around through the loop. */
2307 for (j = 0; j < AHD_NUM_LUNS; j++) {
2309 if (targ->devices[j] == NULL)
2311 dev = targ->devices[j];
2312 ahd_linux_free_device(ahd, dev);
2315 * Forcibly free the target now that
2316 * all devices are gone.
2318 ahd_linux_free_target(ahd, targ);
2322 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
2323 free_irq(ahd->platform_data->irq, ahd);
2324 if (ahd->tags[0] == BUS_SPACE_PIO
2325 && ahd->bshs[0].ioport != 0)
2326 release_region(ahd->bshs[0].ioport, 256);
2327 if (ahd->tags[1] == BUS_SPACE_PIO
2328 && ahd->bshs[1].ioport != 0)
2329 release_region(ahd->bshs[1].ioport, 256);
2330 if (ahd->tags[0] == BUS_SPACE_MEMIO
2331 && ahd->bshs[0].maddr != NULL) {
2334 base_addr = (u_long)ahd->bshs[0].maddr;
2335 base_addr &= PAGE_MASK;
2336 iounmap((void *)base_addr);
2337 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
2338 release_mem_region(ahd->platform_data->mem_busaddr,
2342 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) && \
2343 LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
2345 * In 2.4 we detach from the scsi midlayer before the PCI
2346 * layer invokes our remove callback. No per-instance
2347 * detach is provided, so we must reach inside the PCI
2348 * subsystem's internals and detach our driver manually.
2350 if (ahd->dev_softc != NULL)
2351 ahd->dev_softc->driver = NULL;
2353 free(ahd->platform_data, M_DEVBUF);
2358 ahd_platform_init(struct ahd_softc *ahd)
2361 * Lookup and commit any modified IO Cell options.
2363 if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) {
2364 struct ahd_linux_iocell_opts *iocell_opts;
2366 iocell_opts = &aic79xx_iocell_info[ahd->unit];
2367 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
2368 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
2369 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
2370 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
2371 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
2372 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
2378 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
2380 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
2381 SCB_GET_CHANNEL(ahd, scb),
2382 SCB_GET_LUN(scb), SCB_LIST_NULL,
2383 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
2387 ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
2390 struct ahd_linux_device *dev;
2394 dev = ahd_linux_get_device(ahd, devinfo->channel - 'A',
2396 devinfo->lun, /*alloc*/FALSE);
2399 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
2402 case AHD_QUEUE_NONE:
2405 case AHD_QUEUE_BASIC:
2406 now_queuing = AHD_DEV_Q_BASIC;
2408 case AHD_QUEUE_TAGGED:
2409 now_queuing = AHD_DEV_Q_TAGGED;
2412 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
2413 && (was_queuing != now_queuing)
2414 && (dev->active != 0)) {
2415 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
2419 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
2423 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
2426 * Start out agressively and allow our
2427 * dynamic queue depth algorithm to take
2430 dev->maxtags = usertags;
2431 dev->openings = dev->maxtags - dev->active;
2433 if (dev->maxtags == 0) {
2435 * Queueing is disabled by the user.
2438 } else if (alg == AHD_QUEUE_TAGGED) {
2439 dev->flags |= AHD_DEV_Q_TAGGED;
2440 if (aic79xx_periodic_otag != 0)
2441 dev->flags |= AHD_DEV_PERIODIC_OTAG;
2443 dev->flags |= AHD_DEV_Q_BASIC;
2445 /* We can only have one opening. */
2447 dev->openings = 1 - dev->active;
2449 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
2450 if (dev->scsi_device != NULL) {
2451 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
2452 case AHD_DEV_Q_BASIC:
2453 scsi_adjust_queue_depth(dev->scsi_device,
2455 dev->openings + dev->active);
2457 case AHD_DEV_Q_TAGGED:
2458 scsi_adjust_queue_depth(dev->scsi_device,
2460 dev->openings + dev->active);
2464 * We allow the OS to queue 2 untagged transactions to
2465 * us at any time even though we can only execute them
2466 * serially on the controller/device. This should
2467 * remove some latency.
2469 scsi_adjust_queue_depth(dev->scsi_device,
2479 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
2480 int lun, u_int tag, role_t role, uint32_t status)
2488 if (tag != SCB_LIST_NULL)
2492 if (target != CAM_TARGET_WILDCARD) {
2496 maxtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
2499 if (lun != CAM_LUN_WILDCARD) {
2503 maxlun = AHD_NUM_LUNS;
2507 for (; targ < maxtarg; targ++) {
2509 for (; clun < maxlun; clun++) {
2510 struct ahd_linux_device *dev;
2511 struct ahd_busyq *busyq;
2512 struct ahd_cmd *acmd;
2514 dev = ahd_linux_get_device(ahd, /*chan*/0, targ,
2515 clun, /*alloc*/FALSE);
2519 busyq = &dev->busyq;
2520 while ((acmd = TAILQ_FIRST(busyq)) != NULL) {
2523 cmd = &acmd_scsi_cmd(acmd);
2524 TAILQ_REMOVE(busyq, acmd,
2527 cmd->result = status << 16;
2528 ahd_linux_queue_cmd_complete(ahd, cmd);
2537 ahd_linux_thread_run_complete_queue(struct ahd_softc *ahd)
2541 ahd_lock(ahd, &flags);
2542 del_timer(&ahd->platform_data->completeq_timer);
2543 ahd->platform_data->flags &= ~AHD_RUN_CMPLT_Q_TIMER;
2544 ahd_linux_run_complete_queue(ahd);
2545 ahd_unlock(ahd, &flags);
2549 ahd_linux_start_dv(struct ahd_softc *ahd)
2553 * Freeze the simq and signal ahd_linux_queue to not let any
2554 * more commands through
2556 if ((ahd->platform_data->flags & AHD_DV_ACTIVE) == 0) {
2558 if (ahd_debug & AHD_SHOW_DV)
2559 printf("%s: Starting DV\n", ahd_name(ahd));
2562 ahd->platform_data->flags |= AHD_DV_ACTIVE;
2563 ahd_freeze_simq(ahd);
2565 /* Wake up the DV kthread */
2566 up(&ahd->platform_data->dv_sem);
2571 ahd_linux_dv_thread(void *data)
2573 struct ahd_softc *ahd;
2577 ahd = (struct ahd_softc *)data;
2580 if (ahd_debug & AHD_SHOW_DV)
2581 printf("In DV Thread\n");
2585 * Complete thread creation.
2588 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,60)
2590 * Don't care about any signals.
2592 siginitsetinv(¤t->blocked, 0);
2595 sprintf(current->comm, "ahd_dv_%d", ahd->unit);
2597 daemonize("ahd_dv_%d", ahd->unit);
2598 current->flags |= PF_FREEZE;
2604 * Use down_interruptible() rather than down() to
2605 * avoid inclusion in the load average.
2607 down_interruptible(&ahd->platform_data->dv_sem);
2609 /* Check to see if we've been signaled to exit */
2611 if ((ahd->platform_data->flags & AHD_DV_SHUTDOWN) != 0) {
2612 ahd_unlock(ahd, &s);
2615 ahd_unlock(ahd, &s);
2618 if (ahd_debug & AHD_SHOW_DV)
2619 printf("%s: Beginning Domain Validation\n",
2624 * Wait for any pending commands to drain before proceeding.
2627 while (LIST_FIRST(&ahd->pending_scbs) != NULL) {
2628 ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_EMPTY;
2629 ahd_unlock(ahd, &s);
2630 down_interruptible(&ahd->platform_data->dv_sem);
2635 * Wait for the SIMQ to be released so that DV is the
2636 * only reason the queue is frozen.
2638 while (AHD_DV_SIMQ_FROZEN(ahd) == 0) {
2639 ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_RELEASE;
2640 ahd_unlock(ahd, &s);
2641 down_interruptible(&ahd->platform_data->dv_sem);
2644 ahd_unlock(ahd, &s);
2646 for (target = 0; target < AHD_NUM_TARGETS; target++)
2647 ahd_linux_dv_target(ahd, target);
2650 ahd->platform_data->flags &= ~AHD_DV_ACTIVE;
2651 ahd_unlock(ahd, &s);
2654 * Release the SIMQ so that normal commands are
2655 * allowed to continue on the bus.
2657 ahd_release_simq(ahd);
2659 up(&ahd->platform_data->eh_sem);
2664 ahd_linux_kill_dv_thread(struct ahd_softc *ahd)
2669 if (ahd->platform_data->dv_pid != 0) {
2670 ahd->platform_data->flags |= AHD_DV_SHUTDOWN;
2671 ahd_unlock(ahd, &s);
2672 up(&ahd->platform_data->dv_sem);
2675 * Use the eh_sem as an indicator that the
2676 * dv thread is exiting. Note that the dv
2677 * thread must still return after performing
2678 * the up on our semaphore before it has
2679 * completely exited this module. Unfortunately,
2680 * there seems to be no easy way to wait for the
2681 * exit of a thread for which you are not the
2682 * parent (dv threads are parented by init).
2683 * Cross your fingers...
2685 down(&ahd->platform_data->eh_sem);
2688 * Mark the dv thread as already dead. This
2689 * avoids attempting to kill it a second time.
2690 * This is necessary because we must kill the
2691 * DV thread before calling ahd_free() in the
2692 * module shutdown case to avoid bogus locking
2693 * in the SCSI mid-layer, but we ahd_free() is
2694 * called without killing the DV thread in the
2695 * instance detach case, so ahd_platform_free()
2696 * calls us again to verify that the DV thread
2699 ahd->platform_data->dv_pid = 0;
2701 ahd_unlock(ahd, &s);
2705 #define AHD_LINUX_DV_INQ_SHORT_LEN 36
2706 #define AHD_LINUX_DV_INQ_LEN 256
2707 #define AHD_LINUX_DV_TIMEOUT (HZ / 4)
2709 #define AHD_SET_DV_STATE(ahd, targ, newstate) \
2710 ahd_set_dv_state(ahd, targ, newstate, __LINE__)
2712 static __inline void
2713 ahd_set_dv_state(struct ahd_softc *ahd, struct ahd_linux_target *targ,
2714 ahd_dv_state newstate, u_int line)
2716 ahd_dv_state oldstate;
2718 oldstate = targ->dv_state;
2720 if (ahd_debug & AHD_SHOW_DV)
2721 printf("%s:%d: Going from state %d to state %d\n",
2722 ahd_name(ahd), line, oldstate, newstate);
2725 if (oldstate == newstate)
2726 targ->dv_state_retry++;
2728 targ->dv_state_retry = 0;
2729 targ->dv_state = newstate;
2733 ahd_linux_dv_target(struct ahd_softc *ahd, u_int target_offset)
2735 struct ahd_devinfo devinfo;
2736 struct ahd_linux_target *targ;
2737 struct scsi_cmnd *cmd;
2738 struct scsi_device *scsi_dev;
2739 struct scsi_sense_data *sense;
2749 targ = ahd->platform_data->targets[target_offset];
2750 if (targ == NULL || (targ->flags & AHD_DV_REQUIRED) == 0) {
2751 ahd_unlock(ahd, &s);
2754 ahd_compile_devinfo(&devinfo, ahd->our_id, targ->target, /*lun*/0,
2755 targ->channel + 'A', ROLE_INITIATOR);
2757 if (ahd_debug & AHD_SHOW_DV) {
2758 ahd_print_devinfo(ahd, &devinfo);
2759 printf("Performing DV\n");
2763 ahd_unlock(ahd, &s);
2765 cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK);
2766 scsi_dev = malloc(sizeof(struct scsi_device), M_DEVBUF, M_WAITOK);
2767 scsi_dev->host = ahd->platform_data->host;
2768 scsi_dev->id = devinfo.target;
2769 scsi_dev->lun = devinfo.lun;
2770 scsi_dev->channel = devinfo.channel - 'A';
2771 ahd->platform_data->dv_scsi_dev = scsi_dev;
2773 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_INQ_SHORT_ASYNC);
2775 while (targ->dv_state != AHD_DV_STATE_EXIT) {
2776 timeout = AHD_LINUX_DV_TIMEOUT;
2777 switch (targ->dv_state) {
2778 case AHD_DV_STATE_INQ_SHORT_ASYNC:
2779 case AHD_DV_STATE_INQ_ASYNC:
2780 case AHD_DV_STATE_INQ_ASYNC_VERIFY:
2782 * Set things to async narrow to reduce the
2783 * chance that the INQ will fail.
2786 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
2787 AHD_TRANS_GOAL, /*paused*/FALSE);
2788 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
2789 AHD_TRANS_GOAL, /*paused*/FALSE);
2790 ahd_unlock(ahd, &s);
2792 targ->flags &= ~AHD_INQ_VALID;
2794 case AHD_DV_STATE_INQ_VERIFY:
2798 if (targ->dv_state == AHD_DV_STATE_INQ_SHORT_ASYNC)
2799 inq_len = AHD_LINUX_DV_INQ_SHORT_LEN;
2801 inq_len = targ->inq_data->additional_length + 5;
2802 ahd_linux_dv_inq(ahd, cmd, &devinfo, targ, inq_len);
2805 case AHD_DV_STATE_TUR:
2806 case AHD_DV_STATE_BUSY:
2808 ahd_linux_dv_tur(ahd, cmd, &devinfo);
2810 case AHD_DV_STATE_REBD:
2811 ahd_linux_dv_rebd(ahd, cmd, &devinfo, targ);
2813 case AHD_DV_STATE_WEB:
2814 ahd_linux_dv_web(ahd, cmd, &devinfo, targ);
2817 case AHD_DV_STATE_REB:
2818 ahd_linux_dv_reb(ahd, cmd, &devinfo, targ);
2821 case AHD_DV_STATE_SU:
2822 ahd_linux_dv_su(ahd, cmd, &devinfo, targ);
2827 ahd_print_devinfo(ahd, &devinfo);
2828 printf("Unknown DV state %d\n", targ->dv_state);
2832 /* Queue the command and wait for it to complete */
2833 /* Abuse eh_timeout in the scsi_cmnd struct for our purposes */
2834 init_timer(&cmd->eh_timeout);
2836 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0)
2838 * All of the printfs during negotiation
2839 * really slow down the negotiation.
2840 * Add a bit of time just to be safe.
2844 scsi_add_timer(cmd, timeout, ahd_linux_dv_timeout);
2846 * In 2.5.X, it is assumed that all calls from the
2847 * "midlayer" (which we are emulating) will have the
2848 * ahd host lock held. For other kernels, the
2849 * io_request_lock must be held.
2851 #if AHD_SCSI_HAS_HOST_LOCK != 0
2854 spin_lock_irqsave(&io_request_lock, s);
2856 ahd_linux_queue(cmd, ahd_linux_dv_complete);
2857 #if AHD_SCSI_HAS_HOST_LOCK != 0
2858 ahd_unlock(ahd, &s);
2860 spin_unlock_irqrestore(&io_request_lock, s);
2862 down_interruptible(&ahd->platform_data->dv_cmd_sem);
2864 * Wait for the SIMQ to be released so that DV is the
2865 * only reason the queue is frozen.
2868 while (AHD_DV_SIMQ_FROZEN(ahd) == 0) {
2869 ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_RELEASE;
2870 ahd_unlock(ahd, &s);
2871 down_interruptible(&ahd->platform_data->dv_sem);
2874 ahd_unlock(ahd, &s);
2876 ahd_linux_dv_transition(ahd, cmd, &devinfo, targ);
2880 if ((targ->flags & AHD_INQ_VALID) != 0
2881 && ahd_linux_get_device(ahd, devinfo.channel - 'A',
2882 devinfo.target, devinfo.lun,
2883 /*alloc*/FALSE) == NULL) {
2885 * The DV state machine failed to configure this device.
2886 * This is normal if DV is disabled. Since we have inquiry
2887 * data, filter it and use the "optimistic" negotiation
2888 * parameters found in the inquiry string.
2890 ahd_linux_filter_inquiry(ahd, &devinfo);
2891 if ((targ->flags & (AHD_BASIC_DV|AHD_ENHANCED_DV)) != 0) {
2892 ahd_print_devinfo(ahd, &devinfo);
2893 printf("DV failed to configure device. "
2894 "Please file a bug report against "
2900 free(cmd, M_DEVBUF);
2902 if (ahd->platform_data->dv_scsi_dev != NULL) {
2903 free(ahd->platform_data->dv_scsi_dev, M_DEVBUF);
2904 ahd->platform_data->dv_scsi_dev = NULL;
2908 if (targ->dv_buffer != NULL) {
2909 free(targ->dv_buffer, M_DEVBUF);
2910 targ->dv_buffer = NULL;
2912 if (targ->dv_buffer1 != NULL) {
2913 free(targ->dv_buffer1, M_DEVBUF);
2914 targ->dv_buffer1 = NULL;
2916 targ->flags &= ~AHD_DV_REQUIRED;
2917 if (targ->refcount == 0)
2918 ahd_linux_free_target(ahd, targ);
2919 ahd_unlock(ahd, &s);
2923 ahd_linux_dv_fallback(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
2929 retval = ahd_linux_fallback(ahd, devinfo);
2930 ahd_unlock(ahd, &s);
2936 ahd_linux_dv_transition(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
2937 struct ahd_devinfo *devinfo,
2938 struct ahd_linux_target *targ)
2942 status = aic_error_action(cmd, targ->inq_data,
2943 ahd_cmd_get_transaction_status(cmd),
2944 ahd_cmd_get_scsi_status(cmd));
2948 if (ahd_debug & AHD_SHOW_DV) {
2949 ahd_print_devinfo(ahd, devinfo);
2950 printf("Entering ahd_linux_dv_transition, state= %d, "
2951 "status= 0x%x, cmd->result= 0x%x\n", targ->dv_state,
2952 status, cmd->result);
2956 switch (targ->dv_state) {
2957 case AHD_DV_STATE_INQ_SHORT_ASYNC:
2958 case AHD_DV_STATE_INQ_ASYNC:
2959 switch (status & SS_MASK) {
2962 AHD_SET_DV_STATE(ahd, targ, targ->dv_state+1);
2965 case SS_INQ_REFRESH:
2966 AHD_SET_DV_STATE(ahd, targ,
2967 AHD_DV_STATE_INQ_SHORT_ASYNC);
2971 AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
2972 if (ahd_cmd_get_transaction_status(cmd)
2974 targ->dv_state_retry--;
2975 if ((status & SS_ERRMASK) == EBUSY)
2976 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
2977 if (targ->dv_state_retry < 10)
2981 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
2983 if (ahd_debug & AHD_SHOW_DV) {
2984 ahd_print_devinfo(ahd, devinfo);
2985 printf("Failed DV inquiry, skipping\n");
2991 case AHD_DV_STATE_INQ_ASYNC_VERIFY:
2992 switch (status & SS_MASK) {
2998 if (memcmp(targ->inq_data, targ->dv_buffer,
2999 AHD_LINUX_DV_INQ_LEN) != 0) {
3001 * Inquiry data must have changed.
3002 * Try from the top again.
3004 AHD_SET_DV_STATE(ahd, targ,
3005 AHD_DV_STATE_INQ_SHORT_ASYNC);
3009 AHD_SET_DV_STATE(ahd, targ, targ->dv_state+1);
3010 targ->flags |= AHD_INQ_VALID;
3011 if (ahd_linux_user_dv_setting(ahd) == 0)
3014 xportflags = targ->inq_data->flags;
3015 if ((xportflags & (SID_Sync|SID_WBus16)) == 0)
3018 spi3data = targ->inq_data->spi3data;
3019 switch (spi3data & SID_SPI_CLOCK_DT_ST) {
3021 case SID_SPI_CLOCK_ST:
3022 /* Assume only basic DV is supported. */
3023 targ->flags |= AHD_BASIC_DV;
3025 case SID_SPI_CLOCK_DT:
3026 case SID_SPI_CLOCK_DT_ST:
3027 targ->flags |= AHD_ENHANCED_DV;
3032 case SS_INQ_REFRESH:
3033 AHD_SET_DV_STATE(ahd, targ,
3034 AHD_DV_STATE_INQ_SHORT_ASYNC);
3038 AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
3039 if (ahd_cmd_get_transaction_status(cmd)
3041 targ->dv_state_retry--;
3043 if ((status & SS_ERRMASK) == EBUSY)
3044 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
3045 if (targ->dv_state_retry < 10)
3049 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
3051 if (ahd_debug & AHD_SHOW_DV) {
3052 ahd_print_devinfo(ahd, devinfo);
3053 printf("Failed DV inquiry, skipping\n");
3059 case AHD_DV_STATE_INQ_VERIFY:
3060 switch (status & SS_MASK) {
3064 if (memcmp(targ->inq_data, targ->dv_buffer,
3065 AHD_LINUX_DV_INQ_LEN) == 0) {
3066 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
3071 if (ahd_debug & AHD_SHOW_DV) {
3074 ahd_print_devinfo(ahd, devinfo);
3075 printf("Inquiry buffer mismatch:");
3076 for (i = 0; i < AHD_LINUX_DV_INQ_LEN; i++) {
3079 printf("0x%x:0x0%x ",
3080 ((uint8_t *)targ->inq_data)[i],
3081 targ->dv_buffer[i]);
3087 if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
3088 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
3092 * Do not count "falling back"
3093 * against our retries.
3095 targ->dv_state_retry = 0;
3096 AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
3099 case SS_INQ_REFRESH:
3100 AHD_SET_DV_STATE(ahd, targ,
3101 AHD_DV_STATE_INQ_SHORT_ASYNC);
3105 AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
3106 if (ahd_cmd_get_transaction_status(cmd)
3107 == CAM_REQUEUE_REQ) {
3108 targ->dv_state_retry--;
3109 } else if ((status & SSQ_FALLBACK) != 0) {
3110 if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
3111 AHD_SET_DV_STATE(ahd, targ,
3116 * Do not count "falling back"
3117 * against our retries.
3119 targ->dv_state_retry = 0;
3120 } else if ((status & SS_ERRMASK) == EBUSY)
3121 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
3122 if (targ->dv_state_retry < 10)
3126 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
3128 if (ahd_debug & AHD_SHOW_DV) {
3129 ahd_print_devinfo(ahd, devinfo);
3130 printf("Failed DV inquiry, skipping\n");
3137 case AHD_DV_STATE_TUR:
3138 switch (status & SS_MASK) {
3140 if ((targ->flags & AHD_BASIC_DV) != 0) {
3141 ahd_linux_filter_inquiry(ahd, devinfo);
3142 AHD_SET_DV_STATE(ahd, targ,
3143 AHD_DV_STATE_INQ_VERIFY);
3144 } else if ((targ->flags & AHD_ENHANCED_DV) != 0) {
3145 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_REBD);
3147 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
3152 if ((status & SS_ERRMASK) == EBUSY) {
3153 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
3156 AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
3157 if (ahd_cmd_get_transaction_status(cmd)
3158 == CAM_REQUEUE_REQ) {
3159 targ->dv_state_retry--;
3160 } else if ((status & SSQ_FALLBACK) != 0) {
3161 if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
3162 AHD_SET_DV_STATE(ahd, targ,
3167 * Do not count "falling back"
3168 * against our retries.
3170 targ->dv_state_retry = 0;
3172 if (targ->dv_state_retry >= 10) {
3174 if (ahd_debug & AHD_SHOW_DV) {
3175 ahd_print_devinfo(ahd, devinfo);
3176 printf("DV TUR reties exhausted\n");
3179 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
3182 if (status & SSQ_DELAY)
3187 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_SU);
3189 case SS_INQ_REFRESH:
3190 AHD_SET_DV_STATE(ahd, targ,
3191 AHD_DV_STATE_INQ_SHORT_ASYNC);
3194 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
3199 case AHD_DV_STATE_REBD:
3200 switch (status & SS_MASK) {
3205 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_WEB);
3206 echo_size = scsi_3btoul(&targ->dv_buffer[1]);
3207 echo_size &= 0x1FFF;
3209 if (ahd_debug & AHD_SHOW_DV) {
3210 ahd_print_devinfo(ahd, devinfo);
3211 printf("Echo buffer size= %d\n", echo_size);
3214 if (echo_size == 0) {
3215 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
3219 /* Generate the buffer pattern */
3220 targ->dv_echo_size = echo_size;
3221 ahd_linux_generate_dv_pattern(targ);
3223 * Setup initial negotiation values.
3225 ahd_linux_filter_inquiry(ahd, devinfo);
3228 case SS_INQ_REFRESH:
3229 AHD_SET_DV_STATE(ahd, targ,
3230 AHD_DV_STATE_INQ_SHORT_ASYNC);
3233 AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
3234 if (ahd_cmd_get_transaction_status(cmd)
3236 targ->dv_state_retry--;
3237 if (targ->dv_state_retry <= 10)
3240 if (ahd_debug & AHD_SHOW_DV) {
3241 ahd_print_devinfo(ahd, devinfo);
3242 printf("DV REBD reties exhausted\n");
3249 * Setup initial negotiation values
3250 * and try level 1 DV.
3252 ahd_linux_filter_inquiry(ahd, devinfo);
3253 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_INQ_VERIFY);
3254 targ->dv_echo_size = 0;
3259 case AHD_DV_STATE_WEB:
3260 switch (status & SS_MASK) {
3262 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_REB);
3264 case SS_INQ_REFRESH:
3265 AHD_SET_DV_STATE(ahd, targ,
3266 AHD_DV_STATE_INQ_SHORT_ASYNC);
3269 AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
3270 if (ahd_cmd_get_transaction_status(cmd)
3271 == CAM_REQUEUE_REQ) {
3272 targ->dv_state_retry--;
3273 } else if ((status & SSQ_FALLBACK) != 0) {
3274 if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
3275 AHD_SET_DV_STATE(ahd, targ,
3280 * Do not count "falling back"
3281 * against our retries.
3283 targ->dv_state_retry = 0;
3285 if (targ->dv_state_retry <= 10)
3289 if (ahd_debug & AHD_SHOW_DV) {
3290 ahd_print_devinfo(ahd, devinfo);
3291 printf("DV WEB reties exhausted\n");
3295 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
3300 case AHD_DV_STATE_REB:
3301 switch (status & SS_MASK) {
3303 if (memcmp(targ->dv_buffer, targ->dv_buffer1,
3304 targ->dv_echo_size) != 0) {
3305 if (ahd_linux_dv_fallback(ahd, devinfo) != 0)
3306 AHD_SET_DV_STATE(ahd, targ,
3309 AHD_SET_DV_STATE(ahd, targ,
3314 if (targ->dv_buffer != NULL) {
3315 free(targ->dv_buffer, M_DEVBUF);
3316 targ->dv_buffer = NULL;
3318 if (targ->dv_buffer1 != NULL) {
3319 free(targ->dv_buffer1, M_DEVBUF);
3320 targ->dv_buffer1 = NULL;
3322 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
3324 case SS_INQ_REFRESH:
3325 AHD_SET_DV_STATE(ahd, targ,
3326 AHD_DV_STATE_INQ_SHORT_ASYNC);
3329 AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
3330 if (ahd_cmd_get_transaction_status(cmd)
3331 == CAM_REQUEUE_REQ) {
3332 targ->dv_state_retry--;
3333 } else if ((status & SSQ_FALLBACK) != 0) {
3334 if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
3335 AHD_SET_DV_STATE(ahd, targ,
3339 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_WEB);
3341 if (targ->dv_state_retry <= 10) {
3342 if ((status & (SSQ_DELAY_RANDOM|SSQ_DELAY))!= 0)
3343 msleep(ahd->our_id*1000/10);
3347 if (ahd_debug & AHD_SHOW_DV) {
3348 ahd_print_devinfo(ahd, devinfo);
3349 printf("DV REB reties exhausted\n");
3354 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
3359 case AHD_DV_STATE_SU:
3360 switch (status & SS_MASK) {
3362 case SS_INQ_REFRESH:
3363 AHD_SET_DV_STATE(ahd, targ,
3364 AHD_DV_STATE_INQ_SHORT_ASYNC);
3367 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
3372 case AHD_DV_STATE_BUSY:
3373 switch (status & SS_MASK) {
3375 case SS_INQ_REFRESH:
3376 AHD_SET_DV_STATE(ahd, targ,
3377 AHD_DV_STATE_INQ_SHORT_ASYNC);
3381 AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
3382 if (ahd_cmd_get_transaction_status(cmd)
3383 == CAM_REQUEUE_REQ) {
3384 targ->dv_state_retry--;
3385 } else if (targ->dv_state_retry < 60) {
3386 if ((status & SSQ_DELAY) != 0)
3390 if (ahd_debug & AHD_SHOW_DV) {
3391 ahd_print_devinfo(ahd, devinfo);
3392 printf("DV BUSY reties exhausted\n");
3395 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
3399 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
3405 printf("%s: Invalid DV completion state %d\n", ahd_name(ahd),
3407 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
3413 ahd_linux_dv_fill_cmd(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
3414 struct ahd_devinfo *devinfo)
3416 memset(cmd, 0, sizeof(struct scsi_cmnd));
3417 cmd->device = ahd->platform_data->dv_scsi_dev;
3418 cmd->scsi_done = ahd_linux_dv_complete;
3422 * Synthesize an inquiry command. On the return trip, it'll be
3423 * sniffed and the device transfer settings set for us.
3426 ahd_linux_dv_inq(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
3427 struct ahd_devinfo *devinfo, struct ahd_linux_target *targ,
3428 u_int request_length)
3432 if (ahd_debug & AHD_SHOW_DV) {
3433 ahd_print_devinfo(ahd, devinfo);
3434 printf("Sending INQ\n");
3437 if (targ->inq_data == NULL)
3438 targ->inq_data = malloc(AHD_LINUX_DV_INQ_LEN,
3439 M_DEVBUF, M_WAITOK);
3440 if (targ->dv_state > AHD_DV_STATE_INQ_ASYNC) {
3441 if (targ->dv_buffer != NULL)
3442 free(targ->dv_buffer, M_DEVBUF);
3443 targ->dv_buffer = malloc(AHD_LINUX_DV_INQ_LEN,
3444 M_DEVBUF, M_WAITOK);
3447 ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
3448 cmd->sc_data_direction = SCSI_DATA_READ;
3450 cmd->cmnd[0] = INQUIRY;
3451 cmd->cmnd[4] = request_length;
3452 cmd->request_bufflen = request_length;
3453 if (targ->dv_state > AHD_DV_STATE_INQ_ASYNC)
3454 cmd->request_buffer = targ->dv_buffer;
3456 cmd->request_buffer = targ->inq_data;
3457 memset(cmd->request_buffer, 0, AHD_LINUX_DV_INQ_LEN);
3461 ahd_linux_dv_tur(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
3462 struct ahd_devinfo *devinfo)
3466 if (ahd_debug & AHD_SHOW_DV) {
3467 ahd_print_devinfo(ahd, devinfo);
3468 printf("Sending TUR\n");
3471 /* Do a TUR to clear out any non-fatal transitional state */
3472 ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
3473 cmd->sc_data_direction = SCSI_DATA_NONE;
3475 cmd->cmnd[0] = TEST_UNIT_READY;
3478 #define AHD_REBD_LEN 4
3481 ahd_linux_dv_rebd(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
3482 struct ahd_devinfo *devinfo, struct ahd_linux_target *targ)
3486 if (ahd_debug & AHD_SHOW_DV) {
3487 ahd_print_devinfo(ahd, devinfo);
3488 printf("Sending REBD\n");
3491 if (targ->dv_buffer != NULL)
3492 free(targ->dv_buffer, M_DEVBUF);
3493 targ->dv_buffer = malloc(AHD_REBD_LEN, M_DEVBUF, M_WAITOK);
3494 ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
3495 cmd->sc_data_direction = SCSI_DATA_READ;
3497 cmd->cmnd[0] = READ_BUFFER;
3498 cmd->cmnd[1] = 0x0b;
3499 scsi_ulto3b(AHD_REBD_LEN, &cmd->cmnd[6]);
3500 cmd->request_bufflen = AHD_REBD_LEN;
3501 cmd->underflow = cmd->request_bufflen;
3502 cmd->request_buffer = targ->dv_buffer;
3506 ahd_linux_dv_web(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
3507 struct ahd_devinfo *devinfo, struct ahd_linux_target *targ)
3511 if (ahd_debug & AHD_SHOW_DV) {
3512 ahd_print_devinfo(ahd, devinfo);
3513 printf("Sending WEB\n");
3516 ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
3517 cmd->sc_data_direction = SCSI_DATA_WRITE;
3519 cmd->cmnd[0] = WRITE_BUFFER;
3520 cmd->cmnd[1] = 0x0a;
3521 scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]);
3522 cmd->request_bufflen = targ->dv_echo_size;
3523 cmd->underflow = cmd->request_bufflen;
3524 cmd->request_buffer = targ->dv_buffer;
3528 ahd_linux_dv_reb(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
3529 struct ahd_devinfo *devinfo, struct ahd_linux_target *targ)
3533 if (ahd_debug & AHD_SHOW_DV) {
3534 ahd_print_devinfo(ahd, devinfo);
3535 printf("Sending REB\n");
3538 ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
3539 cmd->sc_data_direction = SCSI_DATA_READ;
3541 cmd->cmnd[0] = READ_BUFFER;
3542 cmd->cmnd[1] = 0x0a;
3543 scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]);
3544 cmd->request_bufflen = targ->dv_echo_size;
3545 cmd->underflow = cmd->request_bufflen;
3546 cmd->request_buffer = targ->dv_buffer1;
3550 ahd_linux_dv_su(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
3551 struct ahd_devinfo *devinfo,
3552 struct ahd_linux_target *targ)
3556 le = SID_IS_REMOVABLE(targ->inq_data) ? SSS_LOEJ : 0;
3559 if (ahd_debug & AHD_SHOW_DV) {
3560 ahd_print_devinfo(ahd, devinfo);
3561 printf("Sending SU\n");
3564 ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
3565 cmd->sc_data_direction = SCSI_DATA_NONE;
3567 cmd->cmnd[0] = START_STOP_UNIT;
3568 cmd->cmnd[4] = le | SSS_START;
3572 ahd_linux_fallback(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
3574 struct ahd_linux_target *targ;
3575 struct ahd_initiator_tinfo *tinfo;
3576 struct ahd_transinfo *goal;
3577 struct ahd_tmode_tstate *tstate;
3585 u_int fallback_speed;
3588 if (ahd_debug & AHD_SHOW_DV) {
3589 ahd_print_devinfo(ahd, devinfo);
3590 printf("Trying to fallback\n");
3593 targ = ahd->platform_data->targets[devinfo->target_offset];
3594 tinfo = ahd_fetch_transinfo(ahd, devinfo->channel,
3595 devinfo->our_scsiid,
3596 devinfo->target, &tstate);
3597 goal = &tinfo->goal;
3598 width = goal->width;
3599 period = goal->period;
3600 offset = goal->offset;
3601 ppr_options = goal->ppr_options;
3603 period = AHD_ASYNC_XFER_PERIOD;
3604 if (targ->dv_next_narrow_period == 0)
3605 targ->dv_next_narrow_period = MAX(period, AHD_SYNCRATE_ULTRA2);
3606 if (targ->dv_next_wide_period == 0)
3607 targ->dv_next_wide_period = period;
3608 if (targ->dv_max_width == 0)
3609 targ->dv_max_width = width;
3610 if (targ->dv_max_ppr_options == 0)
3611 targ->dv_max_ppr_options = ppr_options;
3612 if (targ->dv_last_ppr_options == 0)
3613 targ->dv_last_ppr_options = ppr_options;
3615 cur_speed = aic_calc_speed(width, period, offset, AHD_SYNCRATE_MIN);
3616 wide_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_16_BIT,
3617 targ->dv_next_wide_period,
3618 MAX_OFFSET, AHD_SYNCRATE_MIN);
3619 narrow_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_8_BIT,
3620 targ->dv_next_narrow_period,
3621 MAX_OFFSET, AHD_SYNCRATE_MIN);
3622 fallback_speed = aic_calc_speed(width, period+1, offset,
3625 if (ahd_debug & AHD_SHOW_DV) {
3626 printf("cur_speed= %d, wide_speed= %d, narrow_speed= %d, "
3627 "fallback_speed= %d\n", cur_speed, wide_speed,
3628 narrow_speed, fallback_speed);
3632 if (cur_speed > 160000) {
3634 * Paced/DT/IU_REQ only transfer speeds. All we
3635 * can do is fallback in terms of syncrate.
3638 } else if (cur_speed > 80000) {
3639 if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
3641 * Try without IU_REQ as it may be confusing
3644 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
3647 * Paced/DT only transfer speeds. All we
3648 * can do is fallback in terms of syncrate.
3651 ppr_options = targ->dv_max_ppr_options;
3653 } else if (cur_speed > 3300) {
3656 * In this range we the following
3657 * options ordered from highest to
3658 * lowest desireability:
3662 * o Narrow at a potentally higher sync rate.
3664 * All modes are tested with and without IU_REQ
3665 * set since using IUs may confuse an expander.
3667 if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
3669 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
3670 } else if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0) {
3674 ppr_options = targ->dv_max_ppr_options;
3675 ppr_options &= ~MSG_EXT_PPR_DT_REQ;
3676 } else if (targ->dv_last_ppr_options != 0) {
3678 * Try without QAS or any other PPR options.
3679 * We may need a non-PPR message to work with
3680 * an expander. We look at the "last PPR options"
3681 * so we will perform this fallback even if the
3682 * target responded to our PPR negotiation with
3683 * no option bits set.
3686 } else if (width == MSG_EXT_WDTR_BUS_16_BIT) {
3688 * If the next narrow speed is greater than
3689 * the next wide speed, fallback to narrow.
3690 * Otherwise fallback to the next DT/Wide setting.
3691 * The narrow async speed will always be smaller
3692 * than the wide async speed, so handle this case
3695 ppr_options = targ->dv_max_ppr_options;
3696 if (narrow_speed > fallback_speed
3697 || period >= AHD_ASYNC_XFER_PERIOD) {
3698 targ->dv_next_wide_period = period+1;
3699 width = MSG_EXT_WDTR_BUS_8_BIT;
3700 period = targ->dv_next_narrow_period;
3704 } else if ((ahd->features & AHD_WIDE) != 0
3705 && targ->dv_max_width != 0
3706 && wide_speed >= fallback_speed
3707 && (targ->dv_next_wide_period <= AHD_ASYNC_XFER_PERIOD
3708 || period >= AHD_ASYNC_XFER_PERIOD)) {
3711 * We are narrow. Try falling back
3712 * to the next wide speed with
3713 * all supported ppr options set.
3715 targ->dv_next_narrow_period = period+1;
3716 width = MSG_EXT_WDTR_BUS_16_BIT;
3717 period = targ->dv_next_wide_period;
3718 ppr_options = targ->dv_max_ppr_options;
3720 /* Only narrow fallback is allowed. */
3722 ppr_options = targ->dv_max_ppr_options;
3727 offset = MAX_OFFSET;
3728 ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_PACED);
3729 ahd_set_width(ahd, devinfo, width, AHD_TRANS_GOAL, FALSE);
3734 if (width == MSG_EXT_WDTR_BUS_8_BIT)
3735 targ->dv_next_narrow_period = AHD_ASYNC_XFER_PERIOD;
3737 targ->dv_next_wide_period = AHD_ASYNC_XFER_PERIOD;
3739 ahd_set_syncrate(ahd, devinfo, period, offset,
3740 ppr_options, AHD_TRANS_GOAL, FALSE);
3741 targ->dv_last_ppr_options = ppr_options;
3746 ahd_linux_dv_timeout(struct scsi_cmnd *cmd)
3748 struct ahd_softc *ahd;
3752 ahd = *((struct ahd_softc **)cmd->device->host->hostdata);
3753 ahd_lock(ahd, &flags);
3756 if (ahd_debug & AHD_SHOW_DV) {
3757 printf("%s: Timeout while doing DV command %x.\n",
3758 ahd_name(ahd), cmd->cmnd[0]);
3759 ahd_dump_card_state(ahd);
3764 * Guard against "done race". No action is
3765 * required if we just completed.
3767 if ((scb = (struct scb *)cmd->host_scribble) == NULL) {
3768 ahd_unlock(ahd, &flags);
3773 * Command has not completed. Mark this
3774 * SCB as having failing status prior to
3775 * resetting the bus, so we get the correct
3778 if ((scb->flags & SCB_SENSE) != 0)
3779 ahd_set_transaction_status(scb, CAM_AUTOSENSE_FAIL);
3781 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
3782 ahd_reset_channel(ahd, cmd->device->channel + 'A', /*initiate*/TRUE);
3785 * Add a minimal bus settle delay for devices that are slow to
3786 * respond after bus resets.
3788 ahd_freeze_simq(ahd);
3789 init_timer(&ahd->platform_data->reset_timer);
3790 ahd->platform_data->reset_timer.data = (u_long)ahd;
3791 ahd->platform_data->reset_timer.expires = jiffies + HZ / 2;
3792 ahd->platform_data->reset_timer.function =
3793 (ahd_linux_callback_t *)ahd_release_simq;
3794 add_timer(&ahd->platform_data->reset_timer);
3795 if (ahd_linux_next_device_to_run(ahd) != NULL)
3796 ahd_schedule_runq(ahd);
3797 ahd_linux_run_complete_queue(ahd);
3798 ahd_unlock(ahd, &flags);
3802 ahd_linux_dv_complete(struct scsi_cmnd *cmd)
3804 struct ahd_softc *ahd;
3806 ahd = *((struct ahd_softc **)cmd->device->host->hostdata);
3808 /* Delete the DV timer before it goes off! */
3809 scsi_delete_timer(cmd);
3812 if (ahd_debug & AHD_SHOW_DV)
3813 printf("%s:%c:%d: Command completed, status= 0x%x\n",
3814 ahd_name(ahd), cmd->device->channel, cmd->device->id,
3818 /* Wake up the state machine */
3819 up(&ahd->platform_data->dv_cmd_sem);
3823 ahd_linux_generate_dv_pattern(struct ahd_linux_target *targ)
3829 if (targ->dv_buffer != NULL)
3830 free(targ->dv_buffer, M_DEVBUF);
3831 targ->dv_buffer = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK);
3832 if (targ->dv_buffer1 != NULL)
3833 free(targ->dv_buffer1, M_DEVBUF);
3834 targ->dv_buffer1 = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK);
3839 for (j = 0 ; i < targ->dv_echo_size; j++) {
3842 * 32bytes of sequential numbers.
3844 targ->dv_buffer[i++] = j & 0xff;
3845 } else if (j < 48) {
3847 * 32bytes of repeating 0x0000, 0xffff.
3849 targ->dv_buffer[i++] = (j & 0x02) ? 0xff : 0x00;
3850 } else if (j < 64) {
3852 * 32bytes of repeating 0x5555, 0xaaaa.
3854 targ->dv_buffer[i++] = (j & 0x02) ? 0xaa : 0x55;
3857 * Remaining buffer is filled with a repeating
3861 * ~0x0001 << shifted once in each loop.
3865 targ->dv_buffer[i++] = ~(b >> 8) & 0xff;
3870 targ->dv_buffer[i++] = (~b & 0xff);
3873 targ->dv_buffer[i++] = 0xff;
3880 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
3882 static int warned_user;
3886 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
3887 if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
3889 if (warned_user == 0) {
3891 "aic79xx: WARNING: Insufficient tag_info instances\n"
3892 "aic79xx: for installed controllers. Using defaults\n"
3893 "aic79xx: Please update the aic79xx_tag_info array in\n"
3894 "aic79xx: the aic79xx_osm.c source file.\n");
3897 tags = AHD_MAX_QUEUE;
3899 adapter_tag_info_t *tag_info;
3901 tag_info = &aic79xx_tag_info[ahd->unit];
3902 tags = tag_info->tag_commands[devinfo->target_offset];
3903 if (tags > AHD_MAX_QUEUE)
3904 tags = AHD_MAX_QUEUE;
3911 ahd_linux_user_dv_setting(struct ahd_softc *ahd)
3913 static int warned_user;
3916 if (ahd->unit >= NUM_ELEMENTS(aic79xx_dv_settings)) {
3918 if (warned_user == 0) {
3920 "aic79xx: WARNING: Insufficient dv settings instances\n"
3921 "aic79xx: for installed controllers. Using defaults\n"
3922 "aic79xx: Please update the aic79xx_dv_settings array in"
3923 "aic79xx: the aic79xx_osm.c source file.\n");
3929 dv = aic79xx_dv_settings[ahd->unit];
3934 * Apply the default.
3937 if (ahd->seep_config != 0)
3938 dv = (ahd->seep_config->bios_control & CFENABLEDV);
3944 ahd_linux_setup_user_rd_strm_settings(struct ahd_softc *ahd)
3946 static int warned_user;
3951 * If we have specific read streaming info for this controller,
3952 * apply it. Otherwise use the defaults.
3954 if (ahd->unit >= NUM_ELEMENTS(aic79xx_rd_strm_info)) {
3956 if (warned_user == 0) {
3959 "aic79xx: WARNING: Insufficient rd_strm instances\n"
3960 "aic79xx: for installed controllers. Using defaults\n"
3961 "aic79xx: Please update the aic79xx_rd_strm_info array\n"
3962 "aic79xx: in the aic79xx_osm.c source file.\n");
3965 rd_strm_mask = AIC79XX_CONFIGED_RD_STRM;
3968 rd_strm_mask = aic79xx_rd_strm_info[ahd->unit];
3970 for (target_id = 0; target_id < 16; target_id++) {
3971 struct ahd_devinfo devinfo;
3972 struct ahd_initiator_tinfo *tinfo;
3973 struct ahd_tmode_tstate *tstate;
3975 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
3976 target_id, &tstate);
3977 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
3978 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
3979 tinfo->user.ppr_options &= ~MSG_EXT_PPR_RD_STRM;
3980 if ((rd_strm_mask & devinfo.target_mask) != 0)
3981 tinfo->user.ppr_options |= MSG_EXT_PPR_RD_STRM;
3986 * Determines the queue depth for a given device.
3989 ahd_linux_device_queue_depth(struct ahd_softc *ahd,
3990 struct ahd_linux_device *dev)
3992 struct ahd_devinfo devinfo;
3995 ahd_compile_devinfo(&devinfo,
3997 dev->target->target, dev->lun,
3998 dev->target->channel == 0 ? 'A' : 'B',
4000 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
4002 && dev->scsi_device != NULL
4003 && dev->scsi_device->tagged_supported != 0) {
4005 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
4006 ahd_print_devinfo(ahd, &devinfo);
4007 printf("Tagged Queuing enabled. Depth %d\n", tags);
4009 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
4014 ahd_linux_run_device_queue(struct ahd_softc *ahd, struct ahd_linux_device *dev)
4016 struct ahd_cmd *acmd;
4017 struct scsi_cmnd *cmd;
4019 struct hardware_scb *hscb;
4020 struct ahd_initiator_tinfo *tinfo;
4021 struct ahd_tmode_tstate *tstate;
4025 if ((dev->flags & AHD_DEV_ON_RUN_LIST) != 0)
4026 panic("running device on run list");
4028 while ((acmd = TAILQ_FIRST(&dev->busyq)) != NULL
4029 && dev->openings > 0 && dev->qfrozen == 0) {
4032 * Schedule us to run later. The only reason we are not
4033 * running is because the whole controller Q is frozen.
4035 if (ahd->platform_data->qfrozen != 0
4036 && AHD_DV_SIMQ_FROZEN(ahd) == 0) {
4038 TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq,
4040 dev->flags |= AHD_DEV_ON_RUN_LIST;
4044 cmd = &acmd_scsi_cmd(acmd);
4047 * Get an scb to use.
4049 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
4050 cmd->device->id, &tstate);
4051 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
4052 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
4053 col_idx = AHD_NEVER_COL_IDX;
4055 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
4058 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
4059 TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq,
4061 dev->flags |= AHD_DEV_ON_RUN_LIST;
4062 ahd->flags |= AHD_RESOURCE_SHORTAGE;
4065 TAILQ_REMOVE(&dev->busyq, acmd, acmd_links.tqe);
4067 scb->platform_data->dev = dev;
4069 cmd->host_scribble = (char *)scb;
4072 * Fill out basics of the HSCB.
4075 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
4076 hscb->lun = cmd->device->lun;
4077 scb->hscb->task_management = 0;
4078 mask = SCB_GET_TARGET_MASK(ahd, scb);
4080 if ((ahd->user_discenable & mask) != 0)
4081 hscb->control |= DISCENB;
4083 if (AHD_DV_CMD(cmd) != 0)
4084 scb->flags |= SCB_SILENT;
4086 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
4087 scb->flags |= SCB_PACKETIZED;
4089 if ((tstate->auto_negotiate & mask) != 0) {
4090 scb->flags |= SCB_AUTO_NEGOTIATE;
4091 scb->hscb->control |= MK_MESSAGE;
4094 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
4095 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
4097 uint8_t tag_msgs[2];
4099 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
4100 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
4101 hscb->control |= tag_msgs[0];
4102 if (tag_msgs[0] == MSG_ORDERED_TASK)
4103 dev->commands_since_idle_or_otag = 0;
4106 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
4107 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
4108 hscb->control |= MSG_ORDERED_TASK;
4109 dev->commands_since_idle_or_otag = 0;
4111 hscb->control |= MSG_SIMPLE_TASK;
4115 hscb->cdb_len = cmd->cmd_len;
4116 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
4119 ahd_set_residual(scb, 0);
4120 ahd_set_sense_residual(scb, 0);
4121 if (cmd->use_sg != 0) {
4123 struct scatterlist *cur_seg;
4127 cur_seg = (struct scatterlist *)cmd->request_buffer;
4128 dir = scsi_to_pci_dma_dir(cmd->sc_data_direction);
4129 nseg = pci_map_sg(ahd->dev_softc, cur_seg,
4131 scb->platform_data->xfer_len = 0;
4132 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
4136 addr = sg_dma_address(cur_seg);
4137 len = sg_dma_len(cur_seg);
4138 scb->platform_data->xfer_len += len;
4139 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
4142 } else if (cmd->request_bufflen != 0) {
4148 dir = scsi_to_pci_dma_dir(cmd->sc_data_direction);
4149 addr = pci_map_single(ahd->dev_softc,
4150 cmd->request_buffer,
4151 cmd->request_bufflen, dir);
4152 scb->platform_data->xfer_len = cmd->request_bufflen;
4153 scb->platform_data->buf_busaddr = addr;
4154 sg = ahd_sg_setup(ahd, scb, sg, addr,
4155 cmd->request_bufflen, /*last*/TRUE);
4158 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
4161 dev->commands_issued++;
4163 /* Update the error counting bucket and dump if needed */
4164 if (dev->target->cmds_since_error) {
4165 dev->target->cmds_since_error++;
4166 if (dev->target->cmds_since_error >
4167 AHD_LINUX_ERR_THRESH)
4168 dev->target->cmds_since_error = 0;
4171 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
4172 dev->commands_since_idle_or_otag++;
4173 scb->flags |= SCB_ACTIVE;
4174 ahd_queue_scb(ahd, scb);
4179 * SCSI controller interrupt handler.
4182 ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
4184 struct ahd_softc *ahd;
4188 ahd = (struct ahd_softc *) dev_id;
4189 ahd_lock(ahd, &flags);
4190 ours = ahd_intr(ahd);
4191 if (ahd_linux_next_device_to_run(ahd) != NULL)
4192 ahd_schedule_runq(ahd);
4193 ahd_linux_run_complete_queue(ahd);
4194 ahd_unlock(ahd, &flags);
4195 return IRQ_RETVAL(ours);
4199 ahd_platform_flushwork(struct ahd_softc *ahd)
4202 while (ahd_linux_run_complete_queue(ahd) != NULL)
4206 static struct ahd_linux_target*
4207 ahd_linux_alloc_target(struct ahd_softc *ahd, u_int channel, u_int target)
4209 struct ahd_linux_target *targ;
4211 targ = malloc(sizeof(*targ), M_DEVBUF, M_NOWAIT);
4214 memset(targ, 0, sizeof(*targ));
4215 targ->channel = channel;
4216 targ->target = target;
4218 targ->flags = AHD_DV_REQUIRED;
4219 ahd->platform_data->targets[target] = targ;
4224 ahd_linux_free_target(struct ahd_softc *ahd, struct ahd_linux_target *targ)
4226 struct ahd_devinfo devinfo;
4227 struct ahd_initiator_tinfo *tinfo;
4228 struct ahd_tmode_tstate *tstate;
4230 u_int target_offset;
4234 * Force a negotiation to async/narrow on any
4235 * future command to this device unless a bus
4236 * reset occurs between now and that command.
4238 channel = 'A' + targ->channel;
4239 our_id = ahd->our_id;
4240 target_offset = targ->target;
4241 tinfo = ahd_fetch_transinfo(ahd, channel, our_id,
4242 targ->target, &tstate);
4243 ahd_compile_devinfo(&devinfo, our_id, targ->target, CAM_LUN_WILDCARD,
4244 channel, ROLE_INITIATOR);
4245 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
4246 AHD_TRANS_GOAL, /*paused*/FALSE);
4247 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
4248 AHD_TRANS_GOAL, /*paused*/FALSE);
4249 ahd_update_neg_request(ahd, &devinfo, tstate, tinfo, AHD_NEG_ALWAYS);
4250 ahd->platform_data->targets[target_offset] = NULL;
4251 if (targ->inq_data != NULL)
4252 free(targ->inq_data, M_DEVBUF);
4253 if (targ->dv_buffer != NULL)
4254 free(targ->dv_buffer, M_DEVBUF);
4255 if (targ->dv_buffer1 != NULL)
4256 free(targ->dv_buffer1, M_DEVBUF);
4257 free(targ, M_DEVBUF);
4260 static struct ahd_linux_device*
4261 ahd_linux_alloc_device(struct ahd_softc *ahd,
4262 struct ahd_linux_target *targ, u_int lun)
4264 struct ahd_linux_device *dev;
4266 dev = malloc(sizeof(*dev), M_DEVBUG, M_NOWAIT);
4269 memset(dev, 0, sizeof(*dev));
4270 init_timer(&dev->timer);
4271 TAILQ_INIT(&dev->busyq);
4272 dev->flags = AHD_DEV_UNCONFIGURED;
4277 * We start out life using untagged
4278 * transactions of which we allow one.
4283 * Set maxtags to 0. This will be changed if we
4284 * later determine that we are dealing with
4285 * a tagged queuing capable device.
4290 targ->devices[lun] = dev;
4295 ahd_linux_free_device(struct ahd_softc *ahd, struct ahd_linux_device *dev)
4297 struct ahd_linux_target *targ;
4299 del_timer(&dev->timer);
4301 targ->devices[dev->lun] = NULL;
4302 free(dev, M_DEVBUF);
4304 if (targ->refcount == 0
4305 && (targ->flags & AHD_DV_REQUIRED) == 0)
4306 ahd_linux_free_target(ahd, targ);
4310 ahd_send_async(struct ahd_softc *ahd, char channel,
4311 u_int target, u_int lun, ac_code code, void *arg)
4314 case AC_TRANSFER_NEG:
4317 struct ahd_linux_target *targ;
4318 struct info_str info;
4319 struct ahd_initiator_tinfo *tinfo;
4320 struct ahd_tmode_tstate *tstate;
4323 info.length = sizeof(buf);
4326 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
4330 * Don't bother reporting results while
4331 * negotiations are still pending.
4333 if (tinfo->curr.period != tinfo->goal.period
4334 || tinfo->curr.width != tinfo->goal.width
4335 || tinfo->curr.offset != tinfo->goal.offset
4336 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
4337 if (bootverbose == 0)
4341 * Don't bother reporting results that
4342 * are identical to those last reported.
4344 targ = ahd->platform_data->targets[target];
4347 if (tinfo->curr.period == targ->last_tinfo.period
4348 && tinfo->curr.width == targ->last_tinfo.width
4349 && tinfo->curr.offset == targ->last_tinfo.offset
4350 && tinfo->curr.ppr_options == targ->last_tinfo.ppr_options)
4351 if (bootverbose == 0)
4354 targ->last_tinfo.period = tinfo->curr.period;
4355 targ->last_tinfo.width = tinfo->curr.width;
4356 targ->last_tinfo.offset = tinfo->curr.offset;
4357 targ->last_tinfo.ppr_options = tinfo->curr.ppr_options;
4359 printf("(%s:%c:", ahd_name(ahd), channel);
4360 if (target == CAM_TARGET_WILDCARD)
4363 printf("%d): ", target);
4364 ahd_format_transinfo(&info, &tinfo->curr);
4365 if (info.pos < info.length)
4366 *info.buffer = '\0';
4368 buf[info.length - 1] = '\0';
4374 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
4375 WARN_ON(lun != CAM_LUN_WILDCARD);
4376 scsi_report_device_reset(ahd->platform_data->host,
4377 channel - 'A', target);
4378 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
4379 Scsi_Device *scsi_dev;
4382 * Find the SCSI device associated with this
4383 * request and indicate that a UA is expected.
4385 for (scsi_dev = ahd->platform_data->host->host_queue;
4386 scsi_dev != NULL; scsi_dev = scsi_dev->next) {
4387 if (channel - 'A' == scsi_dev->channel
4388 && target == scsi_dev->id
4389 && (lun == CAM_LUN_WILDCARD
4390 || lun == scsi_dev->lun)) {
4391 scsi_dev->was_reset = 1;
4392 scsi_dev->expecting_cc_ua = 1;
4399 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
4400 if (ahd->platform_data->host != NULL) {
4401 scsi_report_bus_reset(ahd->platform_data->host,
4407 panic("ahd_send_async: Unexpected async event");
4412 * Calls the higher level scsi done function and frees the scb.
4415 ahd_done(struct ahd_softc *ahd, struct scb *scb)
4418 struct ahd_linux_device *dev;
4420 if ((scb->flags & SCB_ACTIVE) == 0) {
4421 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
4422 ahd_dump_card_state(ahd);
4423 panic("Stopping for safety");
4425 LIST_REMOVE(scb, pending_links);
4427 dev = scb->platform_data->dev;
4430 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
4431 cmd->result &= ~(CAM_DEV_QFRZN << 16);
4434 ahd_linux_unmap_scb(ahd, scb);
4437 * Guard against stale sense data.
4438 * The Linux mid-layer assumes that sense
4439 * was retrieved anytime the first byte of
4440 * the sense buffer looks "sane".
4442 cmd->sense_buffer[0] = 0;
4443 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
4444 uint32_t amount_xferred;
4447 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
4448 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
4450 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
4451 ahd_print_path(ahd, scb);
4452 printf("Set CAM_UNCOR_PARITY\n");
4455 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
4456 #ifdef AHD_REPORT_UNDERFLOWS
4458 * This code is disabled by default as some
4459 * clients of the SCSI system do not properly
4460 * initialize the underflow parameter. This
4461 * results in spurious termination of commands
4462 * that complete as expected (e.g. underflow is
4463 * allowed as command can return variable amounts
4466 } else if (amount_xferred < scb->io_ctx->underflow) {
4469 ahd_print_path(ahd, scb);
4471 for (i = 0; i < scb->io_ctx->cmd_len; i++)
4472 printf(" 0x%x", scb->io_ctx->cmnd[i]);
4474 ahd_print_path(ahd, scb);
4475 printf("Saw underflow (%ld of %ld bytes). "
4476 "Treated as error\n",
4477 ahd_get_residual(scb),
4478 ahd_get_transfer_length(scb));
4479 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
4482 ahd_set_transaction_status(scb, CAM_REQ_CMP);
4484 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
4485 ahd_linux_handle_scsi_status(ahd, dev, scb);
4486 } else if (ahd_get_transaction_status(scb) == CAM_SEL_TIMEOUT) {
4487 dev->flags |= AHD_DEV_UNCONFIGURED;
4488 if (AHD_DV_CMD(cmd) == FALSE)
4489 dev->target->flags &= ~AHD_DV_REQUIRED;
4492 * Start DV for devices that require it assuming the first command
4493 * sent does not result in a selection timeout.
4495 if (ahd_get_transaction_status(scb) != CAM_SEL_TIMEOUT
4496 && (dev->target->flags & AHD_DV_REQUIRED) != 0)
4497 ahd_linux_start_dv(ahd);
4499 if (dev->openings == 1
4500 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
4501 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
4502 dev->tag_success_count++;
4504 * Some devices deal with temporary internal resource
4505 * shortages by returning queue full. When the queue
4506 * full occurrs, we throttle back. Slowly try to get
4507 * back to our previous queue depth.
4509 if ((dev->openings + dev->active) < dev->maxtags
4510 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
4511 dev->tag_success_count = 0;
4515 if (dev->active == 0)
4516 dev->commands_since_idle_or_otag = 0;
4518 if (TAILQ_EMPTY(&dev->busyq)) {
4519 if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0
4521 && (dev->flags & AHD_DEV_TIMER_ACTIVE) == 0)
4522 ahd_linux_free_device(ahd, dev);
4523 } else if ((dev->flags & AHD_DEV_ON_RUN_LIST) == 0) {
4524 TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq, dev, links);
4525 dev->flags |= AHD_DEV_ON_RUN_LIST;
4528 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
4529 printf("Recovery SCB completes\n");
4530 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
4531 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
4532 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
4533 if ((scb->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
4534 scb->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
4535 up(&ahd->platform_data->eh_sem);
4539 ahd_free_scb(ahd, scb);
4540 ahd_linux_queue_cmd_complete(ahd, cmd);
4542 if ((ahd->platform_data->flags & AHD_DV_WAIT_SIMQ_EMPTY) != 0
4543 && LIST_FIRST(&ahd->pending_scbs) == NULL) {
4544 ahd->platform_data->flags &= ~AHD_DV_WAIT_SIMQ_EMPTY;
4545 up(&ahd->platform_data->dv_sem);
4550 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
4551 struct ahd_linux_device *dev, struct scb *scb)
4553 struct ahd_devinfo devinfo;
4555 ahd_compile_devinfo(&devinfo,
4557 dev->target->target, dev->lun,
4558 dev->target->channel == 0 ? 'A' : 'B',
4562 * We don't currently trust the mid-layer to
4563 * properly deal with queue full or busy. So,
4564 * when one occurs, we tell the mid-layer to
4565 * unconditionally requeue the command to us
4566 * so that we can retry it ourselves. We also
4567 * implement our own throttling mechanism so
4568 * we don't clobber the device with too many
4571 switch (ahd_get_scsi_status(scb)) {
4574 case SCSI_STATUS_CHECK_COND:
4575 case SCSI_STATUS_CMD_TERMINATED:
4580 * Copy sense information to the OS's cmd
4581 * structure if it is available.
4584 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
4585 struct scsi_status_iu_header *siu;
4589 if (scb->flags & SCB_SENSE) {
4590 sense_size = MIN(sizeof(struct scsi_sense_data)
4591 - ahd_get_sense_residual(scb),
4592 sizeof(cmd->sense_buffer));
4596 * Copy only the sense data into the provided
4599 siu = (struct scsi_status_iu_header *)
4601 sense_size = MIN(scsi_4btoul(siu->sense_length),
4602 sizeof(cmd->sense_buffer));
4603 sense_offset = SIU_SENSE_OFFSET(siu);
4606 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
4607 memcpy(cmd->sense_buffer,
4608 ahd_get_sense_buf(ahd, scb)
4609 + sense_offset, sense_size);
4610 cmd->result |= (DRIVER_SENSE << 24);
4613 if (ahd_debug & AHD_SHOW_SENSE) {
4616 printf("Copied %d bytes of sense data at %d:",
4617 sense_size, sense_offset);
4618 for (i = 0; i < sense_size; i++) {
4621 printf("0x%x ", cmd->sense_buffer[i]);
4629 case SCSI_STATUS_QUEUE_FULL:
4632 * By the time the core driver has returned this
4633 * command, all other commands that were queued
4634 * to us but not the device have been returned.
4635 * This ensures that dev->active is equal to
4636 * the number of commands actually queued to
4639 dev->tag_success_count = 0;
4640 if (dev->active != 0) {
4642 * Drop our opening count to the number
4643 * of commands currently outstanding.
4647 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
4648 ahd_print_path(ahd, scb);
4649 printf("Dropping tag count to %d\n",
4653 if (dev->active == dev->tags_on_last_queuefull) {
4655 dev->last_queuefull_same_count++;
4657 * If we repeatedly see a queue full
4658 * at the same queue depth, this
4659 * device has a fixed number of tag
4660 * slots. Lock in this tag depth
4661 * so we stop seeing queue fulls from
4664 if (dev->last_queuefull_same_count
4665 == AHD_LOCK_TAGS_COUNT) {
4666 dev->maxtags = dev->active;
4667 ahd_print_path(ahd, scb);
4668 printf("Locking max tag count at %d\n",
4672 dev->tags_on_last_queuefull = dev->active;
4673 dev->last_queuefull_same_count = 0;
4675 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
4676 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
4677 ahd_platform_set_tags(ahd, &devinfo,
4678 (dev->flags & AHD_DEV_Q_BASIC)
4679 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
4683 * Drop down to a single opening, and treat this
4684 * as if the target returned BUSY SCSI status.
4687 ahd_platform_set_tags(ahd, &devinfo,
4688 (dev->flags & AHD_DEV_Q_BASIC)
4689 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
4690 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
4693 case SCSI_STATUS_BUSY:
4695 * Set a short timer to defer sending commands for
4696 * a bit since Linux will not delay in this case.
4698 if ((dev->flags & AHD_DEV_TIMER_ACTIVE) != 0) {
4699 printf("%s:%c:%d: Device Timer still active during "
4700 "busy processing\n", ahd_name(ahd),
4701 dev->target->channel, dev->target->target);
4704 dev->flags |= AHD_DEV_TIMER_ACTIVE;
4706 init_timer(&dev->timer);
4707 dev->timer.data = (u_long)dev;
4708 dev->timer.expires = jiffies + (HZ/2);
4709 dev->timer.function = ahd_linux_dev_timed_unfreeze;
4710 add_timer(&dev->timer);
4716 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, Scsi_Cmnd *cmd)
4719 * Typically, the complete queue has very few entries
4720 * queued to it before the queue is emptied by
4721 * ahd_linux_run_complete_queue, so sorting the entries
4722 * by generation number should be inexpensive.
4723 * We perform the sort so that commands that complete
4724 * with an error are retuned in the order origionally
4725 * queued to the controller so that any subsequent retries
4726 * are performed in order. The underlying ahd routines do
4727 * not guarantee the order that aborted commands will be
4730 struct ahd_completeq *completeq;
4731 struct ahd_cmd *list_cmd;
4732 struct ahd_cmd *acmd;
4735 * Map CAM error codes into Linux Error codes. We
4736 * avoid the conversion so that the DV code has the
4737 * full error information available when making
4738 * state change decisions.
4740 if (AHD_DV_CMD(cmd) == FALSE) {
4744 status = ahd_cmd_get_transaction_status(cmd);
4745 if (status != CAM_REQ_CMP) {
4746 struct ahd_linux_device *dev;
4747 struct ahd_devinfo devinfo;
4748 cam_status cam_status;
4752 dev = ahd_linux_get_device(ahd, cmd->device->channel,
4760 ahd_compile_devinfo(&devinfo,
4762 dev->target->target, dev->lun,
4763 dev->target->channel == 0 ? 'A':'B',
4766 scsi_status = ahd_cmd_get_scsi_status(cmd);
4767 cam_status = ahd_cmd_get_transaction_status(cmd);
4768 action = aic_error_action(cmd, dev->target->inq_data,
4769 cam_status, scsi_status);
4770 if ((action & SSQ_FALLBACK) != 0) {
4773 dev->target->errors_detected++;
4774 if (dev->target->cmds_since_error == 0)
4775 dev->target->cmds_since_error++;
4777 dev->target->cmds_since_error = 0;
4778 ahd_linux_fallback(ahd, &devinfo);
4784 case CAM_REQ_INPROG:
4786 case CAM_SCSI_STATUS_ERROR:
4787 new_status = DID_OK;
4789 case CAM_REQ_ABORTED:
4790 new_status = DID_ABORT;
4793 new_status = DID_BUS_BUSY;
4795 case CAM_REQ_INVALID:
4796 case CAM_PATH_INVALID:
4797 new_status = DID_BAD_TARGET;
4799 case CAM_SEL_TIMEOUT:
4800 new_status = DID_NO_CONNECT;
4802 case CAM_SCSI_BUS_RESET:
4804 new_status = DID_RESET;
4806 case CAM_UNCOR_PARITY:
4807 new_status = DID_PARITY;
4809 case CAM_CMD_TIMEOUT:
4810 new_status = DID_TIME_OUT;
4813 case CAM_REQ_CMP_ERR:
4814 case CAM_AUTOSENSE_FAIL:
4816 case CAM_DATA_RUN_ERR:
4817 case CAM_UNEXP_BUSFREE:
4818 case CAM_SEQUENCE_FAIL:
4819 case CAM_CCB_LEN_ERR:
4820 case CAM_PROVIDE_FAIL:
4821 case CAM_REQ_TERMIO:
4822 case CAM_UNREC_HBA_ERROR:
4823 case CAM_REQ_TOO_BIG:
4824 new_status = DID_ERROR;
4826 case CAM_REQUEUE_REQ:
4828 * If we want the request requeued, make sure there
4829 * are sufficent retries. In the old scsi error code,
4830 * we used to be able to specify a result code that
4831 * bypassed the retry count. Now we must use this
4832 * hack. We also "fake" a check condition with
4833 * a sense code of ABORTED COMMAND. This seems to
4834 * evoke a retry even if this command is being sent
4835 * via the eh thread. Ick! Ick! Ick!
4837 if (cmd->retries > 0)
4839 new_status = DID_OK;
4840 ahd_cmd_set_scsi_status(cmd, SCSI_STATUS_CHECK_COND);
4841 cmd->result |= (DRIVER_SENSE << 24);
4842 memset(cmd->sense_buffer, 0,
4843 sizeof(cmd->sense_buffer));
4844 cmd->sense_buffer[0] = SSD_ERRCODE_VALID
4845 | SSD_CURRENT_ERROR;
4846 cmd->sense_buffer[2] = SSD_KEY_ABORTED_COMMAND;
4849 /* We should never get here */
4850 new_status = DID_ERROR;
4854 ahd_cmd_set_transaction_status(cmd, new_status);
4857 completeq = &ahd->platform_data->completeq;
4858 list_cmd = TAILQ_FIRST(completeq);
4859 acmd = (struct ahd_cmd *)cmd;
4860 while (list_cmd != NULL
4861 && acmd_scsi_cmd(list_cmd).serial_number
4862 < acmd_scsi_cmd(acmd).serial_number)
4863 list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe);
4864 if (list_cmd != NULL)
4865 TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe);
4867 TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe);
4871 ahd_linux_filter_inquiry(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
4873 struct scsi_inquiry_data *sid;
4874 struct ahd_initiator_tinfo *tinfo;
4875 struct ahd_transinfo *user;
4876 struct ahd_transinfo *goal;
4877 struct ahd_transinfo *curr;
4878 struct ahd_tmode_tstate *tstate;
4879 struct ahd_linux_device *dev;
4884 u_int trans_version;
4888 * Determine if this lun actually exists. If so,
4889 * hold on to its corresponding device structure.
4890 * If not, make sure we release the device and
4891 * don't bother processing the rest of this inquiry
4894 dev = ahd_linux_get_device(ahd, devinfo->channel - 'A',
4895 devinfo->target, devinfo->lun,
4898 sid = (struct scsi_inquiry_data *)dev->target->inq_data;
4899 if (SID_QUAL(sid) == SID_QUAL_LU_CONNECTED) {
4901 dev->flags &= ~AHD_DEV_UNCONFIGURED;
4903 dev->flags |= AHD_DEV_UNCONFIGURED;
4908 * Update our notion of this device's transfer
4909 * negotiation capabilities.
4911 tinfo = ahd_fetch_transinfo(ahd, devinfo->channel,
4912 devinfo->our_scsiid,
4913 devinfo->target, &tstate);
4914 user = &tinfo->user;
4915 goal = &tinfo->goal;
4916 curr = &tinfo->curr;
4917 width = user->width;
4918 period = user->period;
4919 offset = user->offset;
4920 ppr_options = user->ppr_options;
4921 trans_version = user->transport_version;
4922 prot_version = MIN(user->protocol_version, SID_ANSI_REV(sid));
4925 * Only attempt SPI3/4 once we've verified that
4926 * the device claims to support SPI3/4 features.
4928 if (prot_version < SCSI_REV_2)
4929 trans_version = SID_ANSI_REV(sid);
4931 trans_version = SCSI_REV_2;
4933 if ((sid->flags & SID_WBus16) == 0)
4934 width = MSG_EXT_WDTR_BUS_8_BIT;
4935 if ((sid->flags & SID_Sync) == 0) {
4940 if ((sid->spi3data & SID_SPI_QAS) == 0)
4941 ppr_options &= ~MSG_EXT_PPR_QAS_REQ;
4942 if ((sid->spi3data & SID_SPI_CLOCK_DT) == 0)
4943 ppr_options &= MSG_EXT_PPR_QAS_REQ;
4944 if ((sid->spi3data & SID_SPI_IUS) == 0)
4945 ppr_options &= (MSG_EXT_PPR_DT_REQ
4946 | MSG_EXT_PPR_QAS_REQ);
4948 if (prot_version > SCSI_REV_2
4949 && ppr_options != 0)
4950 trans_version = user->transport_version;
4952 ahd_validate_width(ahd, /*tinfo limit*/NULL, &width, ROLE_UNKNOWN);
4953 ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_MAX);
4954 ahd_validate_offset(ahd, /*tinfo limit*/NULL, period,
4955 &offset, width, ROLE_UNKNOWN);
4956 if (offset == 0 || period == 0) {
4961 /* Apply our filtered user settings. */
4962 curr->transport_version = trans_version;
4963 curr->protocol_version = prot_version;
4964 ahd_set_width(ahd, devinfo, width, AHD_TRANS_GOAL, /*paused*/FALSE);
4965 ahd_set_syncrate(ahd, devinfo, period, offset, ppr_options,
4966 AHD_TRANS_GOAL, /*paused*/FALSE);
4970 ahd_freeze_simq(struct ahd_softc *ahd)
4972 ahd->platform_data->qfrozen++;
4973 if (ahd->platform_data->qfrozen == 1) {
4974 scsi_block_requests(ahd->platform_data->host);
4975 ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS,
4976 CAM_LUN_WILDCARD, SCB_LIST_NULL,
4977 ROLE_INITIATOR, CAM_REQUEUE_REQ);
4982 ahd_release_simq(struct ahd_softc *ahd)
4989 if (ahd->platform_data->qfrozen > 0)
4990 ahd->platform_data->qfrozen--;
4991 if (ahd->platform_data->qfrozen == 0) {
4994 if (AHD_DV_SIMQ_FROZEN(ahd)
4995 && ((ahd->platform_data->flags & AHD_DV_WAIT_SIMQ_RELEASE) != 0)) {
4996 ahd->platform_data->flags &= ~AHD_DV_WAIT_SIMQ_RELEASE;
4997 up(&ahd->platform_data->dv_sem);
4999 ahd_schedule_runq(ahd);
5000 ahd_unlock(ahd, &s);
5002 * There is still a race here. The mid-layer
5003 * should keep its own freeze count and use
5004 * a bottom half handler to run the queues
5005 * so we can unblock with our own lock held.
5008 scsi_unblock_requests(ahd->platform_data->host);
5012 ahd_linux_sem_timeout(u_long arg)
5015 struct ahd_softc *ahd;
5018 scb = (struct scb *)arg;
5019 ahd = scb->ahd_softc;
5021 if ((scb->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
5022 scb->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
5023 up(&ahd->platform_data->eh_sem);
5025 ahd_unlock(ahd, &s);
5029 ahd_linux_dev_timed_unfreeze(u_long arg)
5031 struct ahd_linux_device *dev;
5032 struct ahd_softc *ahd;
5035 dev = (struct ahd_linux_device *)arg;
5036 ahd = dev->target->ahd;
5038 dev->flags &= ~AHD_DEV_TIMER_ACTIVE;
5039 if (dev->qfrozen > 0)
5041 if (dev->qfrozen == 0
5042 && (dev->flags & AHD_DEV_ON_RUN_LIST) == 0)
5043 ahd_linux_run_device_queue(ahd, dev);
5044 if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0
5045 && dev->active == 0)
5046 ahd_linux_free_device(ahd, dev);
5047 ahd_unlock(ahd, &s);
5051 ahd_platform_dump_card_state(struct ahd_softc *ahd)
5053 struct ahd_linux_device *dev;
5059 maxtarget = (ahd->features & AHD_WIDE) ? 15 : 7;
5060 for (target = 0; target <=maxtarget; target++) {
5062 for (lun = 0; lun < AHD_NUM_LUNS; lun++) {
5063 struct ahd_cmd *acmd;
5065 dev = ahd_linux_get_device(ahd, 0, target,
5066 lun, /*alloc*/FALSE);
5070 printf("DevQ(%d:%d:%d): ", 0, target, lun);
5072 TAILQ_FOREACH(acmd, &dev->busyq, acmd_links.tqe) {
5073 if (i++ > AHD_SCB_MAX)
5076 printf("%d waiting\n", i);
5082 ahd_linux_init(void)
5084 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
5085 return ahd_linux_detect(&aic79xx_driver_template);
5087 scsi_register_module(MODULE_SCSI_HA, &aic79xx_driver_template);
5088 if (aic79xx_driver_template.present == 0) {
5089 scsi_unregister_module(MODULE_SCSI_HA,
5090 &aic79xx_driver_template);
5099 ahd_linux_exit(void)
5101 struct ahd_softc *ahd;
5104 * Shutdown DV threads before going into the SCSI mid-layer.
5105 * This avoids situations where the mid-layer locks the entire
5106 * kernel so that waiting for our DV threads to exit leads
5109 TAILQ_FOREACH(ahd, &ahd_tailq, links) {
5111 ahd_linux_kill_dv_thread(ahd);
5114 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
5116 * In 2.4 we have to unregister from the PCI core _after_
5117 * unregistering from the scsi midlayer to avoid dangling
5120 scsi_unregister_module(MODULE_SCSI_HA, &aic79xx_driver_template);
5122 ahd_linux_pci_exit();
5125 module_init(ahd_linux_init);
5126 module_exit(ahd_linux_exit);
git://git.onelab.eu / linux-2.6.git / blob